/usr/bin/java -Xmx16000000000 -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/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:54:46,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:54:46,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:54:46,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:54:46,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:54:46,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:54:46,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:54:46,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:54:46,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:54:46,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:54:46,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:54:46,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:54:46,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:54:46,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:54:46,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:54:46,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:54:46,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:54:46,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:54:46,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:54:46,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:54:46,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:54:46,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:54:46,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:54:46,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:54:46,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 18:54:46,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 18:54:46,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 18:54:46,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 18:54:46,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 18:54:46,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 18:54:46,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:54:46,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:54:46,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:54:46,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:54:46,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:54:46,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:54:46,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:54:46,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:54:46,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:54:46,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:54:46,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:54:46,853 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 [2021-02-19 18:54:46,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:54:46,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:54:46,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:54:46,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:54:46,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:54:46,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:54:46,877 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:54:46,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:54:46,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:54:46,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:54:46,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:54:46,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:54:46,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:54:46,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:54:46,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:54:46,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:54:46,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:54:46,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:54:47,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:54:47,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:54:47,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:54:47,135 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:54:47,137 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:54:47,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-02-19 18:54:47,138 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-02-19 18:54:47,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:54:47,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:54:47,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:54:47,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:54:47,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:54:47,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:54:47,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:54:47,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:54:47,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:54:47,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/1) ... [2021-02-19 18:54:47,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:54:47,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:54:47,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:54:47,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:54:47,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (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 [2021-02-19 18:54:47,295 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:54:47,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:54:47,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:54:47,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:54:47,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:54:47,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:54:47,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:54:47,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:54:47,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:54:47,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:54:47,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:54:47,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:54:47,296 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 18:54:47,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 18:54:47,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 18:54:47,297 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:54:47,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:54:47,475 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:54:47,476 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:54:47 BoogieIcfgContainer [2021-02-19 18:54:47,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:54:47,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:54:47,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:54:47,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:54:47,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:54:47" (1/2) ... [2021-02-19 18:54:47,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad50776 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:54:47, skipping insertion in model container [2021-02-19 18:54:47,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:54:47" (2/2) ... [2021-02-19 18:54:47,481 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-02-19 18:54:47,484 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:54:47,484 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:54:47,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:54:47,486 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:54:47,513 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 18:54:47,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 18:54:47,534 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:54:47,534 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:54:47,535 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:54:47,535 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:54:47,535 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:54:47,535 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:54:47,535 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:54:47,535 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:54:47,540 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-02-19 18:54:47,634 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:54:47,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:47,656 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:47,656 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1786797573, now seen corresponding path program 1 times [2021-02-19 18:54:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:47,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838876178] [2021-02-19 18:54:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:47,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838876178] [2021-02-19 18:54:47,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:47,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 18:54:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484714788] [2021-02-19 18:54:47,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:54:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:54:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:54:47,837 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:47,887 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-02-19 18:54:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:54:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:54:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:47,913 INFO L225 Difference]: With dead ends: 1236 [2021-02-19 18:54:47,914 INFO L226 Difference]: Without dead ends: 1109 [2021-02-19 18:54:47,915 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:54:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-02-19 18:54:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-02-19 18:54:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-02-19 18:54:48,006 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-02-19 18:54:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:48,007 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-02-19 18:54:48,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-02-19 18:54:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:54:48,012 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:48,012 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:48,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:54:48,013 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash -411008387, now seen corresponding path program 1 times [2021-02-19 18:54:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:48,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413552495] [2021-02-19 18:54:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:48,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413552495] [2021-02-19 18:54:48,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:48,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:54:48,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196786012] [2021-02-19 18:54:48,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:48,055 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:48,094 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-02-19 18:54:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:54:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:54:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:48,102 INFO L225 Difference]: With dead ends: 1524 [2021-02-19 18:54:48,102 INFO L226 Difference]: Without dead ends: 1418 [2021-02-19 18:54:48,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-02-19 18:54:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-02-19 18:54:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-02-19 18:54:48,137 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-02-19 18:54:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:48,137 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-02-19 18:54:48,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-02-19 18:54:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:54:48,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:48,142 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:48,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:54:48,142 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash -53557831, now seen corresponding path program 1 times [2021-02-19 18:54:48,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:48,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848357795] [2021-02-19 18:54:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:48,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848357795] [2021-02-19 18:54:48,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:54:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526073268] [2021-02-19 18:54:48,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:48,175 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:48,230 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-02-19 18:54:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:54:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:54:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:48,240 INFO L225 Difference]: With dead ends: 2017 [2021-02-19 18:54:48,240 INFO L226 Difference]: Without dead ends: 1875 [2021-02-19 18:54:48,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-02-19 18:54:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-02-19 18:54:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-02-19 18:54:48,281 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-02-19 18:54:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:48,284 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-02-19 18:54:48,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-02-19 18:54:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:54:48,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:48,290 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:48,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:54:48,290 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -167143723, now seen corresponding path program 1 times [2021-02-19 18:54:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:48,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694750049] [2021-02-19 18:54:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:48,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694750049] [2021-02-19 18:54:48,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128809005] [2021-02-19 18:54:48,335 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 [2021-02-19 18:54:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:54:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:48,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:48,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-02-19 18:54:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242441237] [2021-02-19 18:54:48,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:54:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:54:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:54:48,544 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-02-19 18:54:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:48,642 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-02-19 18:54:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:54:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 [2021-02-19 18:54:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:48,650 INFO L225 Difference]: With dead ends: 2308 [2021-02-19 18:54:48,650 INFO L226 Difference]: Without dead ends: 2108 [2021-02-19 18:54:48,651 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-02-19 18:54:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-02-19 18:54:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-02-19 18:54:48,693 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-02-19 18:54:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-02-19 18:54:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-02-19 18:54:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-02-19 18:54:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:54:48,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:48,699 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:48,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:48,917 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:48,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1348995030, now seen corresponding path program 1 times [2021-02-19 18:54:48,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:48,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617132713] [2021-02-19 18:54:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617132713] [2021-02-19 18:54:48,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:48,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:54:48,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698370503] [2021-02-19 18:54:48,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:48,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:48,939 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:48,997 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-02-19 18:54:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:54:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-02-19 18:54:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:49,014 INFO L225 Difference]: With dead ends: 1950 [2021-02-19 18:54:49,014 INFO L226 Difference]: Without dead ends: 1860 [2021-02-19 18:54:49,015 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-02-19 18:54:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-02-19 18:54:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-02-19 18:54:49,050 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-02-19 18:54:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:49,050 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-02-19 18:54:49,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-02-19 18:54:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:54:49,053 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:49,053 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:49,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:54:49,053 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1757219670, now seen corresponding path program 2 times [2021-02-19 18:54:49,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:49,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246408948] [2021-02-19 18:54:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:49,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246408948] [2021-02-19 18:54:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:49,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:54:49,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174179816] [2021-02-19 18:54:49,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:49,092 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:49,139 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-02-19 18:54:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:54:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-02-19 18:54:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:49,144 INFO L225 Difference]: With dead ends: 1308 [2021-02-19 18:54:49,144 INFO L226 Difference]: Without dead ends: 1308 [2021-02-19 18:54:49,145 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-02-19 18:54:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-02-19 18:54:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-02-19 18:54:49,165 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-02-19 18:54:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:49,167 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-02-19 18:54:49,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-02-19 18:54:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:54:49,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:49,170 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:49,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:54:49,172 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 105082771, now seen corresponding path program 2 times [2021-02-19 18:54:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877017720] [2021-02-19 18:54:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:49,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877017720] [2021-02-19 18:54:49,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:54:49,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:54:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444331710] [2021-02-19 18:54:49,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:54:49,220 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:49,256 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-02-19 18:54:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:54:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-02-19 18:54:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:49,261 INFO L225 Difference]: With dead ends: 1142 [2021-02-19 18:54:49,261 INFO L226 Difference]: Without dead ends: 1120 [2021-02-19 18:54:49,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-02-19 18:54:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-02-19 18:54:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-02-19 18:54:49,281 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-02-19 18:54:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:49,281 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-02-19 18:54:49,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-02-19 18:54:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-02-19 18:54:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:54:49,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:49,283 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:49,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:54:49,284 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1984486866, now seen corresponding path program 1 times [2021-02-19 18:54:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:49,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288613263] [2021-02-19 18:54:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:49,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288613263] [2021-02-19 18:54:49,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133804972] [2021-02-19 18:54:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 18:54:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:54:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:49,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:54:49,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-02-19 18:54:49,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70577952] [2021-02-19 18:54:49,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:49,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,389 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:49,405 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-02-19 18:54:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:54:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:54:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:49,411 INFO L225 Difference]: With dead ends: 1344 [2021-02-19 18:54:49,411 INFO L226 Difference]: Without dead ends: 1344 [2021-02-19 18:54:49,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-02-19 18:54:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-02-19 18:54:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-02-19 18:54:49,432 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-02-19 18:54:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:49,433 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-02-19 18:54:49,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-02-19 18:54:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:54:49,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:49,437 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:49,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:49,650 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:49,650 INFO L82 PathProgramCache]: Analyzing trace with hash 833512658, now seen corresponding path program 1 times [2021-02-19 18:54:49,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:49,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204462608] [2021-02-19 18:54:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204462608] [2021-02-19 18:54:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396224022] [2021-02-19 18:54:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-02-19 18:54:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:54:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:49,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:54:49,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-02-19 18:54:49,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410842176] [2021-02-19 18:54:49,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:54:49,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:54:49,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,744 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:49,761 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-02-19 18:54:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:54:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:54:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:49,779 INFO L225 Difference]: With dead ends: 1608 [2021-02-19 18:54:49,779 INFO L226 Difference]: Without dead ends: 1608 [2021-02-19 18:54:49,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:54:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-02-19 18:54:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-02-19 18:54:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-02-19 18:54:49,808 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-02-19 18:54:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:49,809 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-02-19 18:54:49,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:49,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-02-19 18:54:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:49,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:49,811 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:50,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:50,026 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash -801609776, now seen corresponding path program 1 times [2021-02-19 18:54:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:50,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890664294] [2021-02-19 18:54:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:50,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890664294] [2021-02-19 18:54:50,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123477861] [2021-02-19 18:54:50,200 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 [2021-02-19 18:54:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:50,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:54:50,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:50,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:50,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:50,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-02-19 18:54:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:50,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:50,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:50,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:50,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:50,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:50,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598053449] [2021-02-19 18:54:50,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:50,436 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) 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) [2021-02-19 18:54:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:50,587 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-02-19 18:54:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:54:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) 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 29 [2021-02-19 18:54:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:50,593 INFO L225 Difference]: With dead ends: 2449 [2021-02-19 18:54:50,594 INFO L226 Difference]: Without dead ends: 2370 [2021-02-19 18:54:50,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-02-19 18:54:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-02-19 18:54:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-02-19 18:54:50,627 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-02-19 18:54:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:50,627 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-02-19 18:54:50,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) 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) [2021-02-19 18:54:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-02-19 18:54:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:50,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:50,630 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:50,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:50,846 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:50,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1576428290, now seen corresponding path program 2 times [2021-02-19 18:54:50,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:50,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585489064] [2021-02-19 18:54:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:50,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585489064] [2021-02-19 18:54:50,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695687881] [2021-02-19 18:54:50,964 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 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 [2021-02-19 18:54:51,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:51,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 18:54:51,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-02-19 18:54:51,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:51,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:51,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:51,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387181834] [2021-02-19 18:54:51,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:51,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:51,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:51,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:51,152 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 18:54:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:51,308 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-02-19 18:54:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:54:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 29 [2021-02-19 18:54:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:51,316 INFO L225 Difference]: With dead ends: 2849 [2021-02-19 18:54:51,317 INFO L226 Difference]: Without dead ends: 2770 [2021-02-19 18:54:51,317 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-02-19 18:54:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-02-19 18:54:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-02-19 18:54:51,368 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-02-19 18:54:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:51,369 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-02-19 18:54:51,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 18:54:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-02-19 18:54:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:51,374 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:51,374 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:51,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 18:54:51,589 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash 840782656, now seen corresponding path program 3 times [2021-02-19 18:54:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:51,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425029179] [2021-02-19 18:54:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425029179] [2021-02-19 18:54:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430763811] [2021-02-19 18:54:51,715 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 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 [2021-02-19 18:54:51,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:54:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 18:54:51,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-02-19 18:54:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:51,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:51,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:51,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:51,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:51,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:51,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814987287] [2021-02-19 18:54:51,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:51,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:51,878 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 18:54:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:52,026 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-02-19 18:54:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:54:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:54:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:52,034 INFO L225 Difference]: With dead ends: 2677 [2021-02-19 18:54:52,034 INFO L226 Difference]: Without dead ends: 2598 [2021-02-19 18:54:52,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-02-19 18:54:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-02-19 18:54:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-02-19 18:54:52,076 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-02-19 18:54:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:52,076 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-02-19 18:54:52,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 18:54:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-02-19 18:54:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:52,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:52,080 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:52,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:52,294 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1032352598, now seen corresponding path program 4 times [2021-02-19 18:54:52,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:52,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835545326] [2021-02-19 18:54:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:52,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835545326] [2021-02-19 18:54:52,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308950455] [2021-02-19 18:54:52,430 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 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 [2021-02-19 18:54:52,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 18:54:52,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:52,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:52,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:52,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-02-19 18:54:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:52,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:52,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:52,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:52,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:52,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:52,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:52,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099825294] [2021-02-19 18:54:52,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:52,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:52,576 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 18:54:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:52,843 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-02-19 18:54:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:54:52,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 29 [2021-02-19 18:54:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:52,852 INFO L225 Difference]: With dead ends: 3111 [2021-02-19 18:54:52,852 INFO L226 Difference]: Without dead ends: 3032 [2021-02-19 18:54:52,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:54:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-02-19 18:54:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-02-19 18:54:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-02-19 18:54:52,898 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-02-19 18:54:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-02-19 18:54:52,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 18:54:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-02-19 18:54:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:52,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:52,903 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:53,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:53,119 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:53,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1987490568, now seen corresponding path program 5 times [2021-02-19 18:54:53,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:53,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950105545] [2021-02-19 18:54:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950105545] [2021-02-19 18:54:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132071575] [2021-02-19 18:54:53,232 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 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 [2021-02-19 18:54:53,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:53,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:54:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 18:54:53,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:53,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:53,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:53,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-02-19 18:54:53,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:53,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:53,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:53,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:53,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:53,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:53,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497991919] [2021-02-19 18:54:53,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:53,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:53,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:53,387 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 18:54:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:53,610 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-02-19 18:54:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:54:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:54:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:53,617 INFO L225 Difference]: With dead ends: 2933 [2021-02-19 18:54:53,618 INFO L226 Difference]: Without dead ends: 2854 [2021-02-19 18:54:53,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:54:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-02-19 18:54:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-02-19 18:54:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-02-19 18:54:53,660 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-02-19 18:54:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:53,660 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-02-19 18:54:53,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 18:54:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-02-19 18:54:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:54:53,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:53,663 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:53,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 18:54:53,876 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:53,876 INFO L82 PathProgramCache]: Analyzing trace with hash 166899598, now seen corresponding path program 6 times [2021-02-19 18:54:53,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:53,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436526243] [2021-02-19 18:54:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:53,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436526243] [2021-02-19 18:54:53,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039921343] [2021-02-19 18:54:53,974 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 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 [2021-02-19 18:54:53,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:53,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:54:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:54,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:54,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:54,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:54,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:54,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-02-19 18:54:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 18:54:54,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:54,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:54,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:54,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-02-19 18:54:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:54,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:54,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:54:54,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14238589] [2021-02-19 18:54:54,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:54:54,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:54,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:54:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:54:54,132 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-02-19 18:54:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:54,312 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-02-19 18:54:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:54:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:54:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:54,320 INFO L225 Difference]: With dead ends: 2807 [2021-02-19 18:54:54,320 INFO L226 Difference]: Without dead ends: 2728 [2021-02-19 18:54:54,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:54:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-02-19 18:54:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-02-19 18:54:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-02-19 18:54:54,359 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-02-19 18:54:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:54,359 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-02-19 18:54:54,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-02-19 18:54:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-02-19 18:54:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:54:54,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:54,362 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:54,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:54:54,578 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -196238514, now seen corresponding path program 7 times [2021-02-19 18:54:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:54,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112644109] [2021-02-19 18:54:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:54,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112644109] [2021-02-19 18:54:54,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593673153] [2021-02-19 18:54:54,610 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 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 [2021-02-19 18:54:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:54:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:54:54,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:54,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-02-19 18:54:54,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425961901] [2021-02-19 18:54:54,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:54:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:54:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:54:54,697 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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) [2021-02-19 18:54:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:54,754 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-02-19 18:54:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:54:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 31 [2021-02-19 18:54:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:54,760 INFO L225 Difference]: With dead ends: 3393 [2021-02-19 18:54:54,760 INFO L226 Difference]: Without dead ends: 3242 [2021-02-19 18:54:54,761 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-02-19 18:54:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-02-19 18:54:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-02-19 18:54:54,811 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-02-19 18:54:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:54,811 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-02-19 18:54:54,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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) [2021-02-19 18:54:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-02-19 18:54:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:54:54,815 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:54,815 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:55,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:54:55,034 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1819109966, now seen corresponding path program 8 times [2021-02-19 18:54:55,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:55,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898353263] [2021-02-19 18:54:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898353263] [2021-02-19 18:54:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823045729] [2021-02-19 18:54:55,070 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 [2021-02-19 18:54:55,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:55,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:54:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:55,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:55,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-02-19 18:54:55,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304343544] [2021-02-19 18:54:55,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:54:55,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:54:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:54:55,133 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:55,194 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-02-19 18:54:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:54:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:54:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:55,203 INFO L225 Difference]: With dead ends: 5257 [2021-02-19 18:54:55,203 INFO L226 Difference]: Without dead ends: 5006 [2021-02-19 18:54:55,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:54:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-02-19 18:54:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-02-19 18:54:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-02-19 18:54:55,324 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-02-19 18:54:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:55,325 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-02-19 18:54:55,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-02-19 18:54:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:54:55,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:55,332 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:55,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:54:55,546 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash 942352806, now seen corresponding path program 9 times [2021-02-19 18:54:55,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:55,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049211212] [2021-02-19 18:54:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:54:55,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049211212] [2021-02-19 18:54:55,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936430605] [2021-02-19 18:54:55,579 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 [2021-02-19 18:54:55,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:54:55,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:54:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:54:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:54:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753333181] [2021-02-19 18:54:55,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:54:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:54:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:54:55,675 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:55,940 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-02-19 18:54:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:54:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:54:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:55,969 INFO L225 Difference]: With dead ends: 16323 [2021-02-19 18:54:55,969 INFO L226 Difference]: Without dead ends: 13965 [2021-02-19 18:54:55,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:54:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-02-19 18:54:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-02-19 18:54:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-02-19 18:54:56,190 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-02-19 18:54:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:56,190 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-02-19 18:54:56,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-02-19 18:54:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:54:56,203 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:56,204 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:56,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:54:56,414 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1195609133, now seen corresponding path program 10 times [2021-02-19 18:54:56,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:56,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936175720] [2021-02-19 18:54:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:54:56,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936175720] [2021-02-19 18:54:56,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148342654] [2021-02-19 18:54:56,479 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 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 [2021-02-19 18:54:56,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:56,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:54:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:54:56,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:56,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:54:56,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016070073] [2021-02-19 18:54:56,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:54:56,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:54:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:54:56,598 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 18:54:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:56,911 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-02-19 18:54:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:54:56,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 34 [2021-02-19 18:54:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:56,951 INFO L225 Difference]: With dead ends: 18970 [2021-02-19 18:54:56,951 INFO L226 Difference]: Without dead ends: 18531 [2021-02-19 18:54:56,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-02-19 18:54:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-02-19 18:54:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-02-19 18:54:57,286 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-02-19 18:54:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:57,286 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-02-19 18:54:57,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 18:54:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-02-19 18:54:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:54:57,310 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:57,310 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:57,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:57,525 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash 421979602, now seen corresponding path program 11 times [2021-02-19 18:54:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:57,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419678101] [2021-02-19 18:54:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:57,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419678101] [2021-02-19 18:54:57,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74150184] [2021-02-19 18:54:57,544 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 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 [2021-02-19 18:54:57,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:54:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:57,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:54:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:57,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:57,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-02-19 18:54:57,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115829772] [2021-02-19 18:54:57,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:54:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:54:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:57,660 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:57,991 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-02-19 18:54:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:54:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:54:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:58,093 INFO L225 Difference]: With dead ends: 18432 [2021-02-19 18:54:58,093 INFO L226 Difference]: Without dead ends: 18354 [2021-02-19 18:54:58,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:54:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-02-19 18:54:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-02-19 18:54:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-02-19 18:54:58,379 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-02-19 18:54:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:58,379 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-02-19 18:54:58,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-02-19 18:54:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:54:58,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:58,401 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:58,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:58,602 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash 114311055, now seen corresponding path program 12 times [2021-02-19 18:54:58,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:58,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490396628] [2021-02-19 18:54:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:54:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490396628] [2021-02-19 18:54:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665188808] [2021-02-19 18:54:58,624 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:54:58,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:58,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:58,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:54:58,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:54:58,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:58,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-02-19 18:54:58,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005542101] [2021-02-19 18:54:58,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:54:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:54:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:58,720 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2021-02-19 18:54:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:59,083 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-02-19 18:54:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:54:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 34 [2021-02-19 18:54:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:59,128 INFO L225 Difference]: With dead ends: 20371 [2021-02-19 18:54:59,128 INFO L226 Difference]: Without dead ends: 18706 [2021-02-19 18:54:59,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:54:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-02-19 18:54:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-02-19 18:54:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-02-19 18:54:59,578 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-02-19 18:54:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:59,578 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-02-19 18:54:59,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2021-02-19 18:54:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-02-19 18:54:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:54:59,603 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:59,603 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:59,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:54:59,814 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash -942870026, now seen corresponding path program 13 times [2021-02-19 18:54:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:59,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747268357] [2021-02-19 18:54:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:54:59,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747268357] [2021-02-19 18:54:59,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812301263] [2021-02-19 18:54:59,839 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 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 [2021-02-19 18:54:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:54:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:54:59,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:59,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-02-19 18:54:59,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055854099] [2021-02-19 18:54:59,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:54:59,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:59,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:54:59,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:54:59,930 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:00,336 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-02-19 18:55:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:55:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:55:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:00,407 INFO L225 Difference]: With dead ends: 29290 [2021-02-19 18:55:00,407 INFO L226 Difference]: Without dead ends: 27668 [2021-02-19 18:55:00,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:55:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-02-19 18:55:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-02-19 18:55:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-02-19 18:55:01,030 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-02-19 18:55:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:01,031 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-02-19 18:55:01,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-02-19 18:55:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:55:01,065 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:01,065 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:01,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:01,274 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1874289864, now seen corresponding path program 14 times [2021-02-19 18:55:01,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:01,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331262730] [2021-02-19 18:55:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:55:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331262730] [2021-02-19 18:55:01,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369770421] [2021-02-19 18:55:01,303 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 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 [2021-02-19 18:55:01,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:55:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:55:01,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:01,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-02-19 18:55:01,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980400091] [2021-02-19 18:55:01,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:55:01,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:01,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:55:01,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:55:01,420 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:01,787 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-02-19 18:55:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:55:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:55:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:01,855 INFO L225 Difference]: With dead ends: 27112 [2021-02-19 18:55:01,856 INFO L226 Difference]: Without dead ends: 26976 [2021-02-19 18:55:01,856 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:55:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-02-19 18:55:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-02-19 18:55:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-02-19 18:55:02,348 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-02-19 18:55:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:02,348 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-02-19 18:55:02,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-02-19 18:55:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:55:02,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:02,382 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:02,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:55:02,588 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1522275348, now seen corresponding path program 15 times [2021-02-19 18:55:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110331536] [2021-02-19 18:55:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:55:02,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110331536] [2021-02-19 18:55:02,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913275751] [2021-02-19 18:55:02,612 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 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 [2021-02-19 18:55:02,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:55:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:55:02,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:55:02,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:02,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:55:02,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966954636] [2021-02-19 18:55:02,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:55:02,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:02,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:55:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:55:02,716 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:02,868 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-02-19 18:55:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:03,180 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-02-19 18:55:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:55:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:55:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:03,257 INFO L225 Difference]: With dead ends: 30228 [2021-02-19 18:55:03,258 INFO L226 Difference]: Without dead ends: 30070 [2021-02-19 18:55:03,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:55:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-02-19 18:55:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-02-19 18:55:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-02-19 18:55:03,802 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-02-19 18:55:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:03,802 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-02-19 18:55:03,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-02-19 18:55:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 18:55:03,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:03,840 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:04,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:55:04,049 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2026839, now seen corresponding path program 16 times [2021-02-19 18:55:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:04,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009552939] [2021-02-19 18:55:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:55:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009552939] [2021-02-19 18:55:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671721108] [2021-02-19 18:55:04,081 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 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 [2021-02-19 18:55:04,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:55:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:55:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:04,286 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-02-19 18:55:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:55:04,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:04,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-02-19 18:55:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234899580] [2021-02-19 18:55:04,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:55:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:55:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:55:04,311 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:04,618 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-02-19 18:55:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:55:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 18:55:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:04,685 INFO L225 Difference]: With dead ends: 28338 [2021-02-19 18:55:04,685 INFO L226 Difference]: Without dead ends: 28230 [2021-02-19 18:55:04,685 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:55:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-02-19 18:55:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-02-19 18:55:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-02-19 18:55:05,210 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-02-19 18:55:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:05,210 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-02-19 18:55:05,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-02-19 18:55:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:55:05,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:05,247 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-02-19 18:55:05,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:55:05,448 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2143226625, now seen corresponding path program 17 times [2021-02-19 18:55:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:05,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001863951] [2021-02-19 18:55:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:55:05,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001863951] [2021-02-19 18:55:05,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420804343] [2021-02-19 18:55:05,471 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 [2021-02-19 18:55:05,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:55:05,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:55:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:55:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-02-19 18:55:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764941741] [2021-02-19 18:55:05,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:55:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:55:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:55:05,579 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-02-19 18:55:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:05,848 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-02-19 18:55:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:55:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 37 [2021-02-19 18:55:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:05,933 INFO L225 Difference]: With dead ends: 29898 [2021-02-19 18:55:05,933 INFO L226 Difference]: Without dead ends: 29898 [2021-02-19 18:55:05,933 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:55:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-02-19 18:55:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-02-19 18:55:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-02-19 18:55:06,649 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-02-19 18:55:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:06,650 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-02-19 18:55:06,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-02-19 18:55:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-02-19 18:55:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:55:06,692 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:06,692 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-02-19 18:55:06,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:55:06,893 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1221668475, now seen corresponding path program 18 times [2021-02-19 18:55:06,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:06,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601791958] [2021-02-19 18:55:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:55:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601791958] [2021-02-19 18:55:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70687634] [2021-02-19 18:55:06,911 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 [2021-02-19 18:55:06,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:55:06,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:55:06,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:55:06,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:06,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-02-19 18:55:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223756212] [2021-02-19 18:55:06,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:55:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:55:06,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:55:06,995 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-02-19 18:55:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:07,201 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-02-19 18:55:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:55:07,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-02-19 18:55:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:07,314 INFO L225 Difference]: With dead ends: 37062 [2021-02-19 18:55:07,314 INFO L226 Difference]: Without dead ends: 37062 [2021-02-19 18:55:07,314 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:55:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-02-19 18:55:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-02-19 18:55:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-02-19 18:55:08,432 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-02-19 18:55:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:08,433 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-02-19 18:55:08,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-02-19 18:55:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-02-19 18:55:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:08,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:08,506 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:08,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:55:08,714 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1015506877, now seen corresponding path program 19 times [2021-02-19 18:55:08,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:08,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947638312] [2021-02-19 18:55:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947638312] [2021-02-19 18:55:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836167829] [2021-02-19 18:55:09,013 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 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 [2021-02-19 18:55:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:09,183 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:09,184 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 28 treesize of output 16 [2021-02-19 18:55:09,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:09,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:09,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:09,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-02-19 18:55:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-02-19 18:55:09,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:09,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:09,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:09,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-02-19 18:55:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:09,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:09,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:55:09,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158426261] [2021-02-19 18:55:09,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:09,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:09,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:09,341 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:10,975 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-02-19 18:55:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:55:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:11,227 INFO L225 Difference]: With dead ends: 68650 [2021-02-19 18:55:11,228 INFO L226 Difference]: Without dead ends: 68595 [2021-02-19 18:55:11,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:55:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-02-19 18:55:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-02-19 18:55:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-02-19 18:55:12,512 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-02-19 18:55:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:12,512 INFO L480 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-02-19 18:55:12,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-02-19 18:55:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:12,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:12,579 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:12,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:12,780 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1344940945, now seen corresponding path program 20 times [2021-02-19 18:55:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:12,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25486477] [2021-02-19 18:55:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:13,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25486477] [2021-02-19 18:55:13,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173144817] [2021-02-19 18:55:13,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:13,278 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:13,278 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 28 treesize of output 16 [2021-02-19 18:55:13,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:13,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:13,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:13,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-02-19 18:55:13,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 18:55:13,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:13,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:13,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:13,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:55:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:55:13,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970570795] [2021-02-19 18:55:13,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:55:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:55:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:55:13,466 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:15,712 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-02-19 18:55:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:55:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:15,929 INFO L225 Difference]: With dead ends: 63622 [2021-02-19 18:55:15,929 INFO L226 Difference]: Without dead ends: 63406 [2021-02-19 18:55:15,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:55:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-02-19 18:55:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-02-19 18:55:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-02-19 18:55:17,127 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-02-19 18:55:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:17,127 INFO L480 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-02-19 18:55:17,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-02-19 18:55:17,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:17,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:17,202 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:17,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:55:17,418 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash -741832089, now seen corresponding path program 21 times [2021-02-19 18:55:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:17,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072331133] [2021-02-19 18:55:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:17,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072331133] [2021-02-19 18:55:17,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466988337] [2021-02-19 18:55:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:17,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:55:17,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:17,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:55:17,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:18,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:18,007 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 30 treesize of output 36 [2021-02-19 18:55:18,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:18,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:18,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:18,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:85 [2021-02-19 18:55:18,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:18,204 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 35 treesize of output 43 [2021-02-19 18:55:18,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:18,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:18,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:18,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:55:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:18,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:18,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:55:18,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70039186] [2021-02-19 18:55:18,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:55:18,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:18,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:55:18,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:55:18,360 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:18,834 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-02-19 18:55:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:20,789 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-02-19 18:55:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:55:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:20,977 INFO L225 Difference]: With dead ends: 59288 [2021-02-19 18:55:20,977 INFO L226 Difference]: Without dead ends: 59124 [2021-02-19 18:55:20,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:55:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-02-19 18:55:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-02-19 18:55:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-02-19 18:55:22,009 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-02-19 18:55:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:22,009 INFO L480 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-02-19 18:55:22,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-02-19 18:55:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:22,083 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:22,083 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:22,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:22,284 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1871298297, now seen corresponding path program 22 times [2021-02-19 18:55:22,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:22,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271057621] [2021-02-19 18:55:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271057621] [2021-02-19 18:55:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002719732] [2021-02-19 18:55:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:22,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:55:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:22,853 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:22,854 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 28 treesize of output 16 [2021-02-19 18:55:22,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:22,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-02-19 18:55:22,985 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 35 treesize of output 27 [2021-02-19 18:55:22,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:22,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:55:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:23,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:23,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:55:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855151734] [2021-02-19 18:55:23,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:55:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:55:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:55:23,040 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:23,865 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 18:55:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:25,178 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-02-19 18:55:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:55:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:25,675 INFO L225 Difference]: With dead ends: 76962 [2021-02-19 18:55:25,676 INFO L226 Difference]: Without dead ends: 76778 [2021-02-19 18:55:25,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:55:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-02-19 18:55:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-02-19 18:55:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-02-19 18:55:26,926 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-02-19 18:55:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:26,926 INFO L480 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-02-19 18:55:26,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-02-19 18:55:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:26,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:26,999 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:27,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:55:27,206 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1532084401, now seen corresponding path program 23 times [2021-02-19 18:55:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617369326] [2021-02-19 18:55:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:27,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617369326] [2021-02-19 18:55:27,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184157779] [2021-02-19 18:55:27,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:55:27,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:55:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:55:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:27,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-02-19 18:55:27,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:27,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-02-19 18:55:27,844 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 30 treesize of output 22 [2021-02-19 18:55:27,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:27,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:27,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-02-19 18:55:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:27,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:27,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-02-19 18:55:27,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324007423] [2021-02-19 18:55:27,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:55:27,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:55:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:55:27,899 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:28,845 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:55:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:30,151 INFO L93 Difference]: Finished difference Result 62133 states and 254087 transitions. [2021-02-19 18:55:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:55:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:30,364 INFO L225 Difference]: With dead ends: 62133 [2021-02-19 18:55:30,364 INFO L226 Difference]: Without dead ends: 62078 [2021-02-19 18:55:30,365 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:55:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62078 states. [2021-02-19 18:55:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62078 to 36126. [2021-02-19 18:55:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36125 states have (on average 4.140013840830449) internal successors, (149558), 36125 states have internal predecessors, (149558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 149558 transitions. [2021-02-19 18:55:31,482 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 149558 transitions. Word has length 39 [2021-02-19 18:55:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:31,482 INFO L480 AbstractCegarLoop]: Abstraction has 36126 states and 149558 transitions. [2021-02-19 18:55:31,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 149558 transitions. [2021-02-19 18:55:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:31,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:31,557 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:31,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:55:31,770 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash 402435073, now seen corresponding path program 24 times [2021-02-19 18:55:31,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:31,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770205184] [2021-02-19 18:55:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:32,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770205184] [2021-02-19 18:55:32,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781897552] [2021-02-19 18:55:32,408 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 [2021-02-19 18:55:32,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:55:32,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:55:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:32,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-02-19 18:55:32,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:32,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:32,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:32,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-02-19 18:55:32,797 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 35 treesize of output 27 [2021-02-19 18:55:32,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:32,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:32,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:32,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:55:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:32,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:32,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:55:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65038262] [2021-02-19 18:55:32,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:55:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:55:32,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:55:32,852 INFO L87 Difference]: Start difference. First operand 36126 states and 149558 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:35,242 INFO L93 Difference]: Finished difference Result 62047 states and 253181 transitions. [2021-02-19 18:55:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:55:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:35,419 INFO L225 Difference]: With dead ends: 62047 [2021-02-19 18:55:35,420 INFO L226 Difference]: Without dead ends: 61919 [2021-02-19 18:55:35,421 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:55:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61919 states. [2021-02-19 18:55:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61919 to 36244. [2021-02-19 18:55:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36244 states, 36243 states have (on average 4.138454322213945) internal successors, (149990), 36243 states have internal predecessors, (149990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36244 states to 36244 states and 149990 transitions. [2021-02-19 18:55:36,359 INFO L78 Accepts]: Start accepts. Automaton has 36244 states and 149990 transitions. Word has length 39 [2021-02-19 18:55:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:36,359 INFO L480 AbstractCegarLoop]: Abstraction has 36244 states and 149990 transitions. [2021-02-19 18:55:36,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36244 states and 149990 transitions. [2021-02-19 18:55:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:36,425 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:36,425 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:36,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:55:36,635 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1005543929, now seen corresponding path program 25 times [2021-02-19 18:55:36,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:36,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136897624] [2021-02-19 18:55:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136897624] [2021-02-19 18:55:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98690010] [2021-02-19 18:55:36,965 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 [2021-02-19 18:55:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:37,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:37,144 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 28 treesize of output 16 [2021-02-19 18:55:37,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:37,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:37,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:37,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 18:55:37,241 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 35 treesize of output 27 [2021-02-19 18:55:37,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:37,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:37,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:37,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:55:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:37,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:55:37,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759900094] [2021-02-19 18:55:37,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:55:37,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:37,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:55:37,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:55:37,495 INFO L87 Difference]: Start difference. First operand 36244 states and 149990 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:38,822 INFO L93 Difference]: Finished difference Result 63583 states and 260022 transitions. [2021-02-19 18:55:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:55:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:39,009 INFO L225 Difference]: With dead ends: 63583 [2021-02-19 18:55:39,009 INFO L226 Difference]: Without dead ends: 63391 [2021-02-19 18:55:39,010 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:55:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2021-02-19 18:55:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 36222. [2021-02-19 18:55:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36222 states, 36221 states have (on average 4.139007757930482) internal successors, (149919), 36221 states have internal predecessors, (149919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36222 states to 36222 states and 149919 transitions. [2021-02-19 18:55:40,404 INFO L78 Accepts]: Start accepts. Automaton has 36222 states and 149919 transitions. Word has length 39 [2021-02-19 18:55:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:40,404 INFO L480 AbstractCegarLoop]: Abstraction has 36222 states and 149919 transitions. [2021-02-19 18:55:40,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 36222 states and 149919 transitions. [2021-02-19 18:55:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:40,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:40,488 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:40,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:40,688 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 941504275, now seen corresponding path program 26 times [2021-02-19 18:55:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:40,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469014092] [2021-02-19 18:55:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:40,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469014092] [2021-02-19 18:55:40,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520960962] [2021-02-19 18:55:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:55:41,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:41,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:41,179 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:41,180 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 28 treesize of output 16 [2021-02-19 18:55:41,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:41,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:41,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:41,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 18:55:41,243 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 30 treesize of output 22 [2021-02-19 18:55:41,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:41,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:41,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:41,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-02-19 18:55:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:41,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:41,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:55:41,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276697473] [2021-02-19 18:55:41,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:55:41,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:41,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:55:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:55:41,320 INFO L87 Difference]: Start difference. First operand 36222 states and 149919 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:43,208 INFO L93 Difference]: Finished difference Result 90257 states and 367920 transitions. [2021-02-19 18:55:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:55:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:43,485 INFO L225 Difference]: With dead ends: 90257 [2021-02-19 18:55:43,485 INFO L226 Difference]: Without dead ends: 90202 [2021-02-19 18:55:43,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:55:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90202 states. [2021-02-19 18:55:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90202 to 36036. [2021-02-19 18:55:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.137810462050784) internal successors, (149106), 36035 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 149106 transitions. [2021-02-19 18:55:44,782 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 149106 transitions. Word has length 39 [2021-02-19 18:55:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:44,782 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 149106 transitions. [2021-02-19 18:55:44,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 149106 transitions. [2021-02-19 18:55:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:44,855 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:44,855 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:45,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 18:55:45,055 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 32624599, now seen corresponding path program 27 times [2021-02-19 18:55:45,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:45,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002310607] [2021-02-19 18:55:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002310607] [2021-02-19 18:55:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026170482] [2021-02-19 18:55:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:45,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:55:45,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:55:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:45,996 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:55:45,997 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 32 treesize of output 16 [2021-02-19 18:55:45,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:46,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:46,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:46,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:37 [2021-02-19 18:55:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:46,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:46,216 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 35 treesize of output 27 [2021-02-19 18:55:46,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:46,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:46,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:46,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:13 [2021-02-19 18:55:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:46,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:46,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:55:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281540549] [2021-02-19 18:55:46,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:55:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:55:46,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:55:46,315 INFO L87 Difference]: Start difference. First operand 36036 states and 149106 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:48,901 INFO L93 Difference]: Finished difference Result 73782 states and 298326 transitions. [2021-02-19 18:55:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:55:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:49,112 INFO L225 Difference]: With dead ends: 73782 [2021-02-19 18:55:49,112 INFO L226 Difference]: Without dead ends: 73483 [2021-02-19 18:55:49,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=530, Invalid=2892, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:55:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73483 states. [2021-02-19 18:55:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73483 to 35555. [2021-02-19 18:55:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-02-19 18:55:50,205 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-02-19 18:55:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:50,205 INFO L480 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-02-19 18:55:50,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-02-19 18:55:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:50,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:50,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:50,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:50,473 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2061770951, now seen corresponding path program 28 times [2021-02-19 18:55:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:50,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342052145] [2021-02-19 18:55:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:50,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342052145] [2021-02-19 18:55:50,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036426121] [2021-02-19 18:55:50,760 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 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 [2021-02-19 18:55:50,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:55:50,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:55:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:50,976 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:55:50,976 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 28 treesize of output 16 [2021-02-19 18:55:50,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:50,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:50,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:50,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-02-19 18:55:51,019 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 30 treesize of output 22 [2021-02-19 18:55:51,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:51,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:51,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:51,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-02-19 18:55:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:51,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:51,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:55:51,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661121593] [2021-02-19 18:55:51,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:55:51,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:55:51,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:55:51,070 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:51,344 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:55:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:52,637 INFO L93 Difference]: Finished difference Result 69258 states and 285506 transitions. [2021-02-19 18:55:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:55:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:55:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:52,865 INFO L225 Difference]: With dead ends: 69258 [2021-02-19 18:55:52,865 INFO L226 Difference]: Without dead ends: 69203 [2021-02-19 18:55:52,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:55:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2021-02-19 18:55:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 35829. [2021-02-19 18:55:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35829 states, 35828 states have (on average 4.142095567712404) internal successors, (148403), 35828 states have internal predecessors, (148403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35829 states to 35829 states and 148403 transitions. [2021-02-19 18:55:53,998 INFO L78 Accepts]: Start accepts. Automaton has 35829 states and 148403 transitions. Word has length 39 [2021-02-19 18:55:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:53,999 INFO L480 AbstractCegarLoop]: Abstraction has 35829 states and 148403 transitions. [2021-02-19 18:55:53,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35829 states and 148403 transitions. [2021-02-19 18:55:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:55:54,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:54,311 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:54,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 18:55:54,525 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -127251477, now seen corresponding path program 29 times [2021-02-19 18:55:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:54,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056039613] [2021-02-19 18:55:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:54,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056039613] [2021-02-19 18:55:54,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534206664] [2021-02-19 18:55:54,861 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 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 [2021-02-19 18:55:54,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:55:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:55:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:55,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:55,171 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 32 treesize of output 50 [2021-02-19 18:55:55,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:55,210 INFO L628 ElimStorePlain]: treesize reduction 41, result has 55.4 percent of original size [2021-02-19 18:55:55,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:55,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:46 [2021-02-19 18:55:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:55,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:55,424 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 37 treesize of output 27 [2021-02-19 18:55:55,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:55,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:55,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:55,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-02-19 18:55:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:55,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:55,522 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 20 treesize of output 39 [2021-02-19 18:55:55,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:55,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:55,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:55:55,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 18:55:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:55,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:55,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:55:55,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953244506] [2021-02-19 18:55:55,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:55:55,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:55:55,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:55:55,601 INFO L87 Difference]: Start difference. First operand 35829 states and 148403 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:00,425 INFO L93 Difference]: Finished difference Result 70564 states and 288201 transitions. [2021-02-19 18:56:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:56:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:00,632 INFO L225 Difference]: With dead ends: 70564 [2021-02-19 18:56:00,633 INFO L226 Difference]: Without dead ends: 70343 [2021-02-19 18:56:00,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=735, Invalid=5427, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 18:56:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70343 states. [2021-02-19 18:56:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70343 to 36314. [2021-02-19 18:56:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36314 states, 36313 states have (on average 4.136782970286124) internal successors, (150219), 36313 states have internal predecessors, (150219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36314 states to 36314 states and 150219 transitions. [2021-02-19 18:56:01,730 INFO L78 Accepts]: Start accepts. Automaton has 36314 states and 150219 transitions. Word has length 39 [2021-02-19 18:56:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:01,730 INFO L480 AbstractCegarLoop]: Abstraction has 36314 states and 150219 transitions. [2021-02-19 18:56:01,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 36314 states and 150219 transitions. [2021-02-19 18:56:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:01,794 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:01,795 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:01,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:56:01,995 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash -265696391, now seen corresponding path program 30 times [2021-02-19 18:56:01,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:01,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056560068] [2021-02-19 18:56:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056560068] [2021-02-19 18:56:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320173175] [2021-02-19 18:56:02,321 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 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 [2021-02-19 18:56:02,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:56:02,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:56:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:02,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:02,525 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 28 treesize of output 16 [2021-02-19 18:56:02,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:02,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:02,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:02,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-02-19 18:56:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 18:56:02,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:02,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:02,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:02,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:56:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:02,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:02,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:56:02,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118974032] [2021-02-19 18:56:02,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:56:02,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:02,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:56:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:56:02,649 INFO L87 Difference]: Start difference. First operand 36314 states and 150219 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:04,976 INFO L93 Difference]: Finished difference Result 78441 states and 318679 transitions. [2021-02-19 18:56:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:56:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:05,192 INFO L225 Difference]: With dead ends: 78441 [2021-02-19 18:56:05,192 INFO L226 Difference]: Without dead ends: 78225 [2021-02-19 18:56:05,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:56:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78225 states. [2021-02-19 18:56:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78225 to 35870. [2021-02-19 18:56:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35870 states, 35869 states have (on average 4.14070645961694) internal successors, (148523), 35869 states have internal predecessors, (148523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35870 states to 35870 states and 148523 transitions. [2021-02-19 18:56:06,584 INFO L78 Accepts]: Start accepts. Automaton has 35870 states and 148523 transitions. Word has length 39 [2021-02-19 18:56:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:06,584 INFO L480 AbstractCegarLoop]: Abstraction has 35870 states and 148523 transitions. [2021-02-19 18:56:06,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 35870 states and 148523 transitions. [2021-02-19 18:56:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:06,659 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:06,659 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:06,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 18:56:06,860 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1075965493, now seen corresponding path program 31 times [2021-02-19 18:56:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:06,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008302362] [2021-02-19 18:56:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:07,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008302362] [2021-02-19 18:56:07,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550454469] [2021-02-19 18:56:07,163 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 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 [2021-02-19 18:56:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:56:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:07,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 18:56:07,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:07,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:07,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:07,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-02-19 18:56:07,425 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-02-19 18:56:07,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:07,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:07,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:07,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-02-19 18:56:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:07,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:07,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 18:56:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271638649] [2021-02-19 18:56:07,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:56:07,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:56:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:56:07,483 INFO L87 Difference]: Start difference. First operand 35870 states and 148523 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:09,027 INFO L93 Difference]: Finished difference Result 71485 states and 294347 transitions. [2021-02-19 18:56:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:56:09,028 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:09,238 INFO L225 Difference]: With dead ends: 71485 [2021-02-19 18:56:09,238 INFO L226 Difference]: Without dead ends: 71430 [2021-02-19 18:56:09,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:56:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71430 states. [2021-02-19 18:56:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71430 to 36306. [2021-02-19 18:56:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36306 states, 36305 states have (on average 4.143809392645641) internal successors, (150441), 36305 states have internal predecessors, (150441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36306 states to 36306 states and 150441 transitions. [2021-02-19 18:56:10,319 INFO L78 Accepts]: Start accepts. Automaton has 36306 states and 150441 transitions. Word has length 39 [2021-02-19 18:56:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:10,319 INFO L480 AbstractCegarLoop]: Abstraction has 36306 states and 150441 transitions. [2021-02-19 18:56:10,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36306 states and 150441 transitions. [2021-02-19 18:56:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:10,383 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:10,383 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:10,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 18:56:10,584 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 438377463, now seen corresponding path program 32 times [2021-02-19 18:56:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:10,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125193224] [2021-02-19 18:56:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:10,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125193224] [2021-02-19 18:56:10,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747302968] [2021-02-19 18:56:10,870 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 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 [2021-02-19 18:56:10,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:56:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:56:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:11,103 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 37 treesize of output 29 [2021-02-19 18:56:11,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:11,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:11,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:11,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-02-19 18:56:11,187 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:11,188 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 41 treesize of output 29 [2021-02-19 18:56:11,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:11,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:11,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:11,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-02-19 18:56:11,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-02-19 18:56:11,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:11,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:11,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:11,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:56:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:11,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:56:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037890491] [2021-02-19 18:56:11,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:56:11,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:56:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:56:11,286 INFO L87 Difference]: Start difference. First operand 36306 states and 150441 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:13,477 INFO L93 Difference]: Finished difference Result 91705 states and 378165 transitions. [2021-02-19 18:56:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:56:13,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:13,745 INFO L225 Difference]: With dead ends: 91705 [2021-02-19 18:56:13,745 INFO L226 Difference]: Without dead ends: 91650 [2021-02-19 18:56:13,746 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:56:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91650 states. [2021-02-19 18:56:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91650 to 36546. [2021-02-19 18:56:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36546 states, 36545 states have (on average 4.1456013134491725) internal successors, (151501), 36545 states have internal predecessors, (151501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36546 states to 36546 states and 151501 transitions. [2021-02-19 18:56:15,403 INFO L78 Accepts]: Start accepts. Automaton has 36546 states and 151501 transitions. Word has length 39 [2021-02-19 18:56:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:15,403 INFO L480 AbstractCegarLoop]: Abstraction has 36546 states and 151501 transitions. [2021-02-19 18:56:15,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 36546 states and 151501 transitions. [2021-02-19 18:56:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:15,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:15,477 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:15,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:15,677 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1857370487, now seen corresponding path program 33 times [2021-02-19 18:56:15,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:15,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137985559] [2021-02-19 18:56:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:15,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137985559] [2021-02-19 18:56:15,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214880489] [2021-02-19 18:56:15,954 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 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 [2021-02-19 18:56:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:56:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:56:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:16,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:16,366 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 39 treesize of output 31 [2021-02-19 18:56:16,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:16,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:16,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:16,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-02-19 18:56:16,471 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:56:16,471 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 45 treesize of output 29 [2021-02-19 18:56:16,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:16,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:16,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:16,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:15 [2021-02-19 18:56:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:16,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:16,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:56:16,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633803586] [2021-02-19 18:56:16,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:56:16,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:16,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:56:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:56:16,555 INFO L87 Difference]: Start difference. First operand 36546 states and 151501 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:19,168 INFO L93 Difference]: Finished difference Result 74724 states and 305912 transitions. [2021-02-19 18:56:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:56:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:19,381 INFO L225 Difference]: With dead ends: 74724 [2021-02-19 18:56:19,381 INFO L226 Difference]: Without dead ends: 74562 [2021-02-19 18:56:19,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=2289, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:56:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74562 states. [2021-02-19 18:56:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74562 to 37394. [2021-02-19 18:56:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37394 states, 37393 states have (on average 4.135453159682293) internal successors, (154637), 37393 states have internal predecessors, (154637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 154637 transitions. [2021-02-19 18:56:20,534 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 154637 transitions. Word has length 39 [2021-02-19 18:56:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:20,534 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 154637 transitions. [2021-02-19 18:56:20,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 154637 transitions. [2021-02-19 18:56:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:20,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:20,602 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:20,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 18:56:20,802 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash -960582497, now seen corresponding path program 34 times [2021-02-19 18:56:20,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:20,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408196118] [2021-02-19 18:56:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:21,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408196118] [2021-02-19 18:56:21,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789713099] [2021-02-19 18:56:21,188 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 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 [2021-02-19 18:56:21,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:56:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:56:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:21,749 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:21,749 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-02-19 18:56:21,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:21,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:21,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:21,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 18:56:21,793 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 35 treesize of output 27 [2021-02-19 18:56:21,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:21,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:21,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:21,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:56:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:21,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:21,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:56:21,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202968332] [2021-02-19 18:56:21,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:56:21,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:56:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:56:21,850 INFO L87 Difference]: Start difference. First operand 37394 states and 154637 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:23,325 INFO L93 Difference]: Finished difference Result 65874 states and 269019 transitions. [2021-02-19 18:56:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:56:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:23,515 INFO L225 Difference]: With dead ends: 65874 [2021-02-19 18:56:23,515 INFO L226 Difference]: Without dead ends: 65626 [2021-02-19 18:56:23,515 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:56:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65626 states. [2021-02-19 18:56:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65626 to 37580. [2021-02-19 18:56:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37580 states, 37579 states have (on average 4.133611857686474) internal successors, (155337), 37579 states have internal predecessors, (155337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37580 states to 37580 states and 155337 transitions. [2021-02-19 18:56:24,667 INFO L78 Accepts]: Start accepts. Automaton has 37580 states and 155337 transitions. Word has length 39 [2021-02-19 18:56:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:24,667 INFO L480 AbstractCegarLoop]: Abstraction has 37580 states and 155337 transitions. [2021-02-19 18:56:24,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37580 states and 155337 transitions. [2021-02-19 18:56:24,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:24,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:24,884 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:25,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 18:56:25,084 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1056503555, now seen corresponding path program 35 times [2021-02-19 18:56:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:25,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304896348] [2021-02-19 18:56:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304896348] [2021-02-19 18:56:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39755327] [2021-02-19 18:56:25,438 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 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 [2021-02-19 18:56:25,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:56:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:56:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:25,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:25,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-02-19 18:56:25,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:25,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:25,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:56:25,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:76 [2021-02-19 18:56:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-02-19 18:56:26,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-02-19 18:56:26,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:56:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,040 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 16 treesize of output 10 [2021-02-19 18:56:26,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:26,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-02-19 18:56:26,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-02-19 18:56:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,251 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 20 treesize of output 39 [2021-02-19 18:56:26,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:56:26,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:26,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 18:56:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:26,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:26,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:56:26,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492791608] [2021-02-19 18:56:26,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:56:26,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:26,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:56:26,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:56:26,328 INFO L87 Difference]: Start difference. First operand 37580 states and 155337 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:36,817 INFO L93 Difference]: Finished difference Result 88919 states and 360014 transitions. [2021-02-19 18:56:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:56:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:37,082 INFO L225 Difference]: With dead ends: 88919 [2021-02-19 18:56:37,083 INFO L226 Difference]: Without dead ends: 88436 [2021-02-19 18:56:37,084 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1175, Invalid=7196, Unknown=1, NotChecked=0, Total=8372 [2021-02-19 18:56:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88436 states. [2021-02-19 18:56:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88436 to 37762. [2021-02-19 18:56:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37762 states, 37761 states have (on average 4.132491194618787) internal successors, (156047), 37761 states have internal predecessors, (156047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37762 states to 37762 states and 156047 transitions. [2021-02-19 18:56:38,352 INFO L78 Accepts]: Start accepts. Automaton has 37762 states and 156047 transitions. Word has length 39 [2021-02-19 18:56:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:38,352 INFO L480 AbstractCegarLoop]: Abstraction has 37762 states and 156047 transitions. [2021-02-19 18:56:38,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37762 states and 156047 transitions. [2021-02-19 18:56:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:38,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:38,421 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:38,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:38,621 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1260424301, now seen corresponding path program 36 times [2021-02-19 18:56:38,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:38,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123339062] [2021-02-19 18:56:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:39,099 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:56:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:39,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123339062] [2021-02-19 18:56:39,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153973923] [2021-02-19 18:56:39,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:56:39,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:56:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:56:39,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:39,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:39,646 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 39 treesize of output 31 [2021-02-19 18:56:39,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:39,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:39,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:39,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:38 [2021-02-19 18:56:39,698 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:39,698 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 41 treesize of output 29 [2021-02-19 18:56:39,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:39,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:39,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:39,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-02-19 18:56:39,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:39,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2021-02-19 18:56:39,737 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:39,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:39,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:39,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:56:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:39,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:39,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:56:39,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625328962] [2021-02-19 18:56:39,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:56:39,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:56:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:56:39,812 INFO L87 Difference]: Start difference. First operand 37762 states and 156047 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:41,991 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 18:56:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:42,893 INFO L93 Difference]: Finished difference Result 64025 states and 260453 transitions. [2021-02-19 18:56:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:56:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:43,075 INFO L225 Difference]: With dead ends: 64025 [2021-02-19 18:56:43,075 INFO L226 Difference]: Without dead ends: 63877 [2021-02-19 18:56:43,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=541, Invalid=2881, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:56:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63877 states. [2021-02-19 18:56:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63877 to 37872. [2021-02-19 18:56:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37872 states, 37871 states have (on average 4.1311557656254125) internal successors, (156451), 37871 states have internal predecessors, (156451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37872 states to 37872 states and 156451 transitions. [2021-02-19 18:56:44,059 INFO L78 Accepts]: Start accepts. Automaton has 37872 states and 156451 transitions. Word has length 39 [2021-02-19 18:56:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:44,059 INFO L480 AbstractCegarLoop]: Abstraction has 37872 states and 156451 transitions. [2021-02-19 18:56:44,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37872 states and 156451 transitions. [2021-02-19 18:56:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:44,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:44,128 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:44,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:44,330 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -337337623, now seen corresponding path program 37 times [2021-02-19 18:56:44,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:44,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392491485] [2021-02-19 18:56:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392491485] [2021-02-19 18:56:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631245805] [2021-02-19 18:56:44,682 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 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 [2021-02-19 18:56:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:44,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:56:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:44,939 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 37 treesize of output 29 [2021-02-19 18:56:44,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:44,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:44,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:44,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:56:44,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:44,981 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 39 treesize of output 27 [2021-02-19 18:56:44,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:44,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:44,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:44,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:56:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:45,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:45,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:56:45,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209117971] [2021-02-19 18:56:45,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:56:45,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:56:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:56:45,040 INFO L87 Difference]: Start difference. First operand 37872 states and 156451 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:47,284 INFO L93 Difference]: Finished difference Result 95670 states and 388054 transitions. [2021-02-19 18:56:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:56:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:47,560 INFO L225 Difference]: With dead ends: 95670 [2021-02-19 18:56:47,561 INFO L226 Difference]: Without dead ends: 95534 [2021-02-19 18:56:47,561 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:56:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95534 states. [2021-02-19 18:56:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95534 to 37724. [2021-02-19 18:56:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37724 states, 37723 states have (on average 4.133950110012459) internal successors, (155945), 37723 states have internal predecessors, (155945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37724 states to 37724 states and 155945 transitions. [2021-02-19 18:56:49,071 INFO L78 Accepts]: Start accepts. Automaton has 37724 states and 155945 transitions. Word has length 39 [2021-02-19 18:56:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:49,071 INFO L480 AbstractCegarLoop]: Abstraction has 37724 states and 155945 transitions. [2021-02-19 18:56:49,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37724 states and 155945 transitions. [2021-02-19 18:56:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:49,138 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:49,138 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:49,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:49,338 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 598152159, now seen corresponding path program 38 times [2021-02-19 18:56:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:49,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592369328] [2021-02-19 18:56:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:49,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592369328] [2021-02-19 18:56:49,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193090203] [2021-02-19 18:56:49,709 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 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 [2021-02-19 18:56:49,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:56:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:49,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:56:49,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:49,945 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:56:49,945 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 33 treesize of output 21 [2021-02-19 18:56:49,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:49,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:49,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:49,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 18:56:50,028 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 35 treesize of output 27 [2021-02-19 18:56:50,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:50,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:50,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:50,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:56:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:50,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:50,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:56:50,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425290841] [2021-02-19 18:56:50,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:56:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:56:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:56:50,084 INFO L87 Difference]: Start difference. First operand 37724 states and 155945 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:51,528 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 18:56:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:51,860 INFO L93 Difference]: Finished difference Result 64921 states and 265381 transitions. [2021-02-19 18:56:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:56:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:52,051 INFO L225 Difference]: With dead ends: 64921 [2021-02-19 18:56:52,051 INFO L226 Difference]: Without dead ends: 64729 [2021-02-19 18:56:52,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:56:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64729 states. [2021-02-19 18:56:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64729 to 37748. [2021-02-19 18:56:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37748 states, 37747 states have (on average 4.133547036850611) internal successors, (156029), 37747 states have internal predecessors, (156029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37748 states to 37748 states and 156029 transitions. [2021-02-19 18:56:53,165 INFO L78 Accepts]: Start accepts. Automaton has 37748 states and 156029 transitions. Word has length 39 [2021-02-19 18:56:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:53,165 INFO L480 AbstractCegarLoop]: Abstraction has 37748 states and 156029 transitions. [2021-02-19 18:56:53,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37748 states and 156029 transitions. [2021-02-19 18:56:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:56:53,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:53,237 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:53,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 18:56:53,437 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1547033099, now seen corresponding path program 39 times [2021-02-19 18:56:53,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:53,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250390069] [2021-02-19 18:56:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:53,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250390069] [2021-02-19 18:56:53,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384091169] [2021-02-19 18:56:53,844 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 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 [2021-02-19 18:56:53,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:56:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:56:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:54,205 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 35 treesize of output 19 [2021-02-19 18:56:54,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:54,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:54,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:56:54,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-02-19 18:56:54,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:54,344 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 33 treesize of output 41 [2021-02-19 18:56:54,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:54,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:54,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:56:54,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-02-19 18:56:54,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:54,432 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 16 [2021-02-19 18:56:54,434 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:54,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:54,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:56:54,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-02-19 18:56:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-02-19 18:56:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977463533] [2021-02-19 18:56:54,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:56:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:56:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:56:54,651 INFO L87 Difference]: Start difference. First operand 37748 states and 156029 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:59,451 INFO L93 Difference]: Finished difference Result 63618 states and 257868 transitions. [2021-02-19 18:56:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:56:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:56:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:59,630 INFO L225 Difference]: With dead ends: 63618 [2021-02-19 18:56:59,631 INFO L226 Difference]: Without dead ends: 63470 [2021-02-19 18:56:59,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=764, Invalid=4206, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:56:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63470 states. [2021-02-19 18:57:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63470 to 38042. [2021-02-19 18:57:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38042 states, 38041 states have (on average 4.129728450881943) internal successors, (157099), 38041 states have internal predecessors, (157099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38042 states to 38042 states and 157099 transitions. [2021-02-19 18:57:00,664 INFO L78 Accepts]: Start accepts. Automaton has 38042 states and 157099 transitions. Word has length 39 [2021-02-19 18:57:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:00,664 INFO L480 AbstractCegarLoop]: Abstraction has 38042 states and 157099 transitions. [2021-02-19 18:57:00,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 38042 states and 157099 transitions. [2021-02-19 18:57:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:00,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:00,735 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:00,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:00,935 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1066097287, now seen corresponding path program 40 times [2021-02-19 18:57:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623256514] [2021-02-19 18:57:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623256514] [2021-02-19 18:57:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461519663] [2021-02-19 18:57:01,373 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 [2021-02-19 18:57:01,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:57:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:01,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:01,670 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 33 treesize of output 21 [2021-02-19 18:57:01,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:01,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:01,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:01,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-02-19 18:57:01,718 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 35 treesize of output 27 [2021-02-19 18:57:01,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:01,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:01,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:01,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:57:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:01,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:01,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:57:01,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674540008] [2021-02-19 18:57:01,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:57:01,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:57:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:57:01,776 INFO L87 Difference]: Start difference. First operand 38042 states and 157099 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:04,263 INFO L93 Difference]: Finished difference Result 80069 states and 324863 transitions. [2021-02-19 18:57:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:57:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:04,756 INFO L225 Difference]: With dead ends: 80069 [2021-02-19 18:57:04,757 INFO L226 Difference]: Without dead ends: 79845 [2021-02-19 18:57:04,757 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:57:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79845 states. [2021-02-19 18:57:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79845 to 37934. [2021-02-19 18:57:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37934 states, 37933 states have (on average 4.131732264782643) internal successors, (156729), 37933 states have internal predecessors, (156729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37934 states to 37934 states and 156729 transitions. [2021-02-19 18:57:06,036 INFO L78 Accepts]: Start accepts. Automaton has 37934 states and 156729 transitions. Word has length 39 [2021-02-19 18:57:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:06,036 INFO L480 AbstractCegarLoop]: Abstraction has 37934 states and 156729 transitions. [2021-02-19 18:57:06,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 37934 states and 156729 transitions. [2021-02-19 18:57:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:06,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:06,107 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:06,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:06,308 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1870733813, now seen corresponding path program 41 times [2021-02-19 18:57:06,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:06,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585623171] [2021-02-19 18:57:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585623171] [2021-02-19 18:57:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937982957] [2021-02-19 18:57:06,687 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 [2021-02-19 18:57:06,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:57:06,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:57:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,145 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 41 treesize of output 57 [2021-02-19 18:57:07,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:07,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:07,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:98 [2021-02-19 18:57:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-02-19 18:57:07,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,331 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 41 treesize of output 59 [2021-02-19 18:57:07,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:07,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,339 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 16 treesize of output 10 [2021-02-19 18:57:07,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:07,418 INFO L628 ElimStorePlain]: treesize reduction 30, result has 75.8 percent of original size [2021-02-19 18:57:07,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-02-19 18:57:07,428 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-02-19 18:57:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:07,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,617 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 20 treesize of output 39 [2021-02-19 18:57:07,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:07,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:07,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:07,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 18:57:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:07,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:07,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:57:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504902329] [2021-02-19 18:57:07,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:57:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:57:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:57:07,701 INFO L87 Difference]: Start difference. First operand 37934 states and 156729 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:08,625 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-19 18:57:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:13,867 INFO L93 Difference]: Finished difference Result 88895 states and 360004 transitions. [2021-02-19 18:57:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:57:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:14,121 INFO L225 Difference]: With dead ends: 88895 [2021-02-19 18:57:14,122 INFO L226 Difference]: Without dead ends: 88428 [2021-02-19 18:57:14,122 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1128, Invalid=6882, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:57:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88428 states. [2021-02-19 18:57:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88428 to 38088. [2021-02-19 18:57:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38088 states, 38087 states have (on average 4.130516974295691) internal successors, (157319), 38087 states have internal predecessors, (157319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38088 states to 38088 states and 157319 transitions. [2021-02-19 18:57:15,339 INFO L78 Accepts]: Start accepts. Automaton has 38088 states and 157319 transitions. Word has length 39 [2021-02-19 18:57:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 38088 states and 157319 transitions. [2021-02-19 18:57:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38088 states and 157319 transitions. [2021-02-19 18:57:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:15,405 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:15,405 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:15,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 18:57:15,606 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1666813067, now seen corresponding path program 42 times [2021-02-19 18:57:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:15,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937939030] [2021-02-19 18:57:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:16,116 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:57:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:16,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937939030] [2021-02-19 18:57:16,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286989377] [2021-02-19 18:57:16,218 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 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 [2021-02-19 18:57:16,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:57:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:57:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:16,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:16,705 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 37 treesize of output 29 [2021-02-19 18:57:16,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:16,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:36 [2021-02-19 18:57:16,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:16,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:57:16,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:16,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:16,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:57:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:16,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:16,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-02-19 18:57:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465453177] [2021-02-19 18:57:16,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:57:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:57:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:57:16,825 INFO L87 Difference]: Start difference. First operand 38088 states and 157319 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:19,310 INFO L93 Difference]: Finished difference Result 60604 states and 246603 transitions. [2021-02-19 18:57:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:57:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:19,480 INFO L225 Difference]: With dead ends: 60604 [2021-02-19 18:57:19,480 INFO L226 Difference]: Without dead ends: 60514 [2021-02-19 18:57:19,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:57:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60514 states. [2021-02-19 18:57:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60514 to 38176. [2021-02-19 18:57:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38176 states, 38175 states have (on average 4.12890635232482) internal successors, (157621), 38175 states have internal predecessors, (157621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38176 states to 38176 states and 157621 transitions. [2021-02-19 18:57:20,498 INFO L78 Accepts]: Start accepts. Automaton has 38176 states and 157621 transitions. Word has length 39 [2021-02-19 18:57:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:20,498 INFO L480 AbstractCegarLoop]: Abstraction has 38176 states and 157621 transitions. [2021-02-19 18:57:20,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 38176 states and 157621 transitions. [2021-02-19 18:57:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:20,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:20,566 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:20,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 18:57:20,766 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:20,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1030392305, now seen corresponding path program 43 times [2021-02-19 18:57:20,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:20,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691269290] [2021-02-19 18:57:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691269290] [2021-02-19 18:57:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005557331] [2021-02-19 18:57:21,189 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:57:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:57:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 18:57:21,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:21,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:57:21,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:21,529 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 39 treesize of output 27 [2021-02-19 18:57:21,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:21,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:21,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:57:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:21,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:21,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:57:21,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939668646] [2021-02-19 18:57:21,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:57:21,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:57:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:57:21,591 INFO L87 Difference]: Start difference. First operand 38176 states and 157621 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:24,136 INFO L93 Difference]: Finished difference Result 95903 states and 388827 transitions. [2021-02-19 18:57:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:57:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:24,411 INFO L225 Difference]: With dead ends: 95903 [2021-02-19 18:57:24,411 INFO L226 Difference]: Without dead ends: 95767 [2021-02-19 18:57:24,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:57:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95767 states. [2021-02-19 18:57:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95767 to 37760. [2021-02-19 18:57:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37760 states, 37759 states have (on average 4.1332397574088295) internal successors, (156067), 37759 states have internal predecessors, (156067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37760 states to 37760 states and 156067 transitions. [2021-02-19 18:57:25,715 INFO L78 Accepts]: Start accepts. Automaton has 37760 states and 156067 transitions. Word has length 39 [2021-02-19 18:57:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:25,715 INFO L480 AbstractCegarLoop]: Abstraction has 37760 states and 156067 transitions. [2021-02-19 18:57:25,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 37760 states and 156067 transitions. [2021-02-19 18:57:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:25,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:25,781 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:25,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-02-19 18:57:25,981 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash -430659637, now seen corresponding path program 44 times [2021-02-19 18:57:25,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:25,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910642421] [2021-02-19 18:57:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:26,291 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-02-19 18:57:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910642421] [2021-02-19 18:57:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49993540] [2021-02-19 18:57:26,586 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 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 [2021-02-19 18:57:26,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:57:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:26,806 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:26,806 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 28 treesize of output 16 [2021-02-19 18:57:26,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:26,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:26,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:26,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 18:57:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-02-19 18:57:26,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:26,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:26,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:26,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-02-19 18:57:26,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:26,968 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 16 [2021-02-19 18:57:26,969 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:26,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:26,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:26,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:57:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:27,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:27,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:57:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795520786] [2021-02-19 18:57:27,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:57:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:57:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:57:27,031 INFO L87 Difference]: Start difference. First operand 37760 states and 156067 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:29,453 INFO L93 Difference]: Finished difference Result 80696 states and 332151 transitions. [2021-02-19 18:57:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:57:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:29,686 INFO L225 Difference]: With dead ends: 80696 [2021-02-19 18:57:29,686 INFO L226 Difference]: Without dead ends: 80641 [2021-02-19 18:57:29,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:57:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80641 states. [2021-02-19 18:57:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80641 to 38076. [2021-02-19 18:57:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38076 states, 38075 states have (on average 4.131424819435325) internal successors, (157304), 38075 states have internal predecessors, (157304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38076 states to 38076 states and 157304 transitions. [2021-02-19 18:57:30,812 INFO L78 Accepts]: Start accepts. Automaton has 38076 states and 157304 transitions. Word has length 39 [2021-02-19 18:57:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:30,812 INFO L480 AbstractCegarLoop]: Abstraction has 38076 states and 157304 transitions. [2021-02-19 18:57:30,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 38076 states and 157304 transitions. [2021-02-19 18:57:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:30,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:30,880 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:31,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:31,090 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1503859837, now seen corresponding path program 45 times [2021-02-19 18:57:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:31,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216778184] [2021-02-19 18:57:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:31,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216778184] [2021-02-19 18:57:31,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805338830] [2021-02-19 18:57:31,497 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 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 [2021-02-19 18:57:31,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:57:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:57:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:31,719 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:57:31,719 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 32 treesize of output 16 [2021-02-19 18:57:31,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:31,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:31,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:31,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-02-19 18:57:31,836 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 37 treesize of output 29 [2021-02-19 18:57:31,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:31,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:31,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:31,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-02-19 18:57:31,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:31,875 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 16 [2021-02-19 18:57:31,876 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:31,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:31,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:31,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:57:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:31,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:31,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:57:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424780057] [2021-02-19 18:57:31,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:57:31,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:57:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:57:31,950 INFO L87 Difference]: Start difference. First operand 38076 states and 157304 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:34,727 INFO L93 Difference]: Finished difference Result 70830 states and 289088 transitions. [2021-02-19 18:57:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:57:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:34,932 INFO L225 Difference]: With dead ends: 70830 [2021-02-19 18:57:34,932 INFO L226 Difference]: Without dead ends: 70579 [2021-02-19 18:57:34,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:57:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70579 states. [2021-02-19 18:57:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70579 to 37926. [2021-02-19 18:57:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37926 states, 37925 states have (on average 4.132261041529334) internal successors, (156716), 37925 states have internal predecessors, (156716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37926 states to 37926 states and 156716 transitions. [2021-02-19 18:57:36,022 INFO L78 Accepts]: Start accepts. Automaton has 37926 states and 156716 transitions. Word has length 39 [2021-02-19 18:57:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:36,022 INFO L480 AbstractCegarLoop]: Abstraction has 37926 states and 156716 transitions. [2021-02-19 18:57:36,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 37926 states and 156716 transitions. [2021-02-19 18:57:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:36,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:36,089 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:36,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 18:57:36,290 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2106968693, now seen corresponding path program 46 times [2021-02-19 18:57:36,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:36,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667560717] [2021-02-19 18:57:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:36,686 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 18:57:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667560717] [2021-02-19 18:57:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207662706] [2021-02-19 18:57:36,932 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 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 [2021-02-19 18:57:36,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:57:36,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:57:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:37,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:37,172 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 28 treesize of output 16 [2021-02-19 18:57:37,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:37,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:37,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:37,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 18:57:37,300 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 35 treesize of output 27 [2021-02-19 18:57:37,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:37,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:37,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:37,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:57:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:37,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:37,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:57:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976920473] [2021-02-19 18:57:37,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:57:37,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:57:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:57:37,363 INFO L87 Difference]: Start difference. First operand 37926 states and 156716 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:39,548 INFO L93 Difference]: Finished difference Result 65698 states and 268480 transitions. [2021-02-19 18:57:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:57:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:39,718 INFO L225 Difference]: With dead ends: 65698 [2021-02-19 18:57:39,718 INFO L226 Difference]: Without dead ends: 65506 [2021-02-19 18:57:39,719 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:57:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65506 states. [2021-02-19 18:57:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65506 to 37887. [2021-02-19 18:57:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37887 states, 37886 states have (on average 4.132555561421105) internal successors, (156566), 37886 states have internal predecessors, (156566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37887 states to 37887 states and 156566 transitions. [2021-02-19 18:57:40,796 INFO L78 Accepts]: Start accepts. Automaton has 37887 states and 156566 transitions. Word has length 39 [2021-02-19 18:57:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:40,797 INFO L480 AbstractCegarLoop]: Abstraction has 37887 states and 156566 transitions. [2021-02-19 18:57:40,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37887 states and 156566 transitions. [2021-02-19 18:57:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:40,864 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:40,864 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:41,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 18:57:41,066 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash -960346187, now seen corresponding path program 47 times [2021-02-19 18:57:41,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:41,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378009813] [2021-02-19 18:57:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:41,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378009813] [2021-02-19 18:57:41,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755145643] [2021-02-19 18:57:41,385 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 [2021-02-19 18:57:41,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:57:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:41,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:57:41,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:41,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:41,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2021-02-19 18:57:41,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:41,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:41,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:41,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:51 [2021-02-19 18:57:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:41,962 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 32 treesize of output 22 [2021-02-19 18:57:41,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:41,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:41,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:41,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:12 [2021-02-19 18:57:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:42,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:42,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-02-19 18:57:42,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014770490] [2021-02-19 18:57:42,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:57:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:57:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:57:42,029 INFO L87 Difference]: Start difference. First operand 37887 states and 156566 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:45,485 INFO L93 Difference]: Finished difference Result 61673 states and 251158 transitions. [2021-02-19 18:57:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:57:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:45,645 INFO L225 Difference]: With dead ends: 61673 [2021-02-19 18:57:45,646 INFO L226 Difference]: Without dead ends: 61618 [2021-02-19 18:57:45,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:57:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61618 states. [2021-02-19 18:57:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61618 to 38597. [2021-02-19 18:57:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38597 states, 38596 states have (on average 4.131179396828687) internal successors, (159447), 38596 states have internal predecessors, (159447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38597 states to 38597 states and 159447 transitions. [2021-02-19 18:57:46,638 INFO L78 Accepts]: Start accepts. Automaton has 38597 states and 159447 transitions. Word has length 39 [2021-02-19 18:57:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:46,638 INFO L480 AbstractCegarLoop]: Abstraction has 38597 states and 159447 transitions. [2021-02-19 18:57:46,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38597 states and 159447 transitions. [2021-02-19 18:57:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:46,706 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:46,706 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:46,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 18:57:46,919 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -525738725, now seen corresponding path program 48 times [2021-02-19 18:57:46,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:46,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529991332] [2021-02-19 18:57:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:47,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529991332] [2021-02-19 18:57:47,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771995671] [2021-02-19 18:57:47,318 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 [2021-02-19 18:57:47,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:57:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:57:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:47,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:47,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:47,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2021-02-19 18:57:47,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:47,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:47,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-02-19 18:57:47,711 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 35 treesize of output 27 [2021-02-19 18:57:47,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:47,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:47,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:18 [2021-02-19 18:57:47,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,978 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 16 [2021-02-19 18:57:47,980 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:47,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:47,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-02-19 18:57:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:48,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:48,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-02-19 18:57:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544026577] [2021-02-19 18:57:48,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:57:48,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:57:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:57:48,076 INFO L87 Difference]: Start difference. First operand 38597 states and 159447 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:51,884 INFO L93 Difference]: Finished difference Result 75836 states and 309198 transitions. [2021-02-19 18:57:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:57:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:52,100 INFO L225 Difference]: With dead ends: 75836 [2021-02-19 18:57:52,100 INFO L226 Difference]: Without dead ends: 75495 [2021-02-19 18:57:52,101 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=609, Invalid=3681, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:57:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75495 states. [2021-02-19 18:57:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75495 to 38748. [2021-02-19 18:57:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38748 states, 38747 states have (on average 4.129506800526492) internal successors, (160006), 38747 states have internal predecessors, (160006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38748 states to 38748 states and 160006 transitions. [2021-02-19 18:57:53,206 INFO L78 Accepts]: Start accepts. Automaton has 38748 states and 160006 transitions. Word has length 39 [2021-02-19 18:57:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:53,206 INFO L480 AbstractCegarLoop]: Abstraction has 38748 states and 160006 transitions. [2021-02-19 18:57:53,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 38748 states and 160006 transitions. [2021-02-19 18:57:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:53,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:53,274 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:53,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:53,474 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1268482101, now seen corresponding path program 49 times [2021-02-19 18:57:53,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:53,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838104035] [2021-02-19 18:57:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:53,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838104035] [2021-02-19 18:57:53,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271547028] [2021-02-19 18:57:53,815 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 [2021-02-19 18:57:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:57:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:54,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:54,062 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 28 treesize of output 16 [2021-02-19 18:57:54,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:54,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:54,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:54,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 18:57:54,110 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 30 treesize of output 22 [2021-02-19 18:57:54,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:54,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:54,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:54,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-02-19 18:57:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:54,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:57:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120401165] [2021-02-19 18:57:54,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:57:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:57:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:57:54,201 INFO L87 Difference]: Start difference. First operand 38748 states and 160006 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:56,642 INFO L93 Difference]: Finished difference Result 95383 states and 388080 transitions. [2021-02-19 18:57:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:57:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:57:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:56,916 INFO L225 Difference]: With dead ends: 95383 [2021-02-19 18:57:56,916 INFO L226 Difference]: Without dead ends: 95328 [2021-02-19 18:57:56,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=1922, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:57:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95328 states. [2021-02-19 18:57:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95328 to 38345. [2021-02-19 18:57:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38345 states, 38344 states have (on average 4.130502816607553) internal successors, (158380), 38344 states have internal predecessors, (158380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38345 states to 38345 states and 158380 transitions. [2021-02-19 18:57:58,563 INFO L78 Accepts]: Start accepts. Automaton has 38345 states and 158380 transitions. Word has length 39 [2021-02-19 18:57:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:58,563 INFO L480 AbstractCegarLoop]: Abstraction has 38345 states and 158380 transitions. [2021-02-19 18:57:58,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 38345 states and 158380 transitions. [2021-02-19 18:57:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:57:58,634 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:58,634 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:58,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 18:57:58,834 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash 835728373, now seen corresponding path program 50 times [2021-02-19 18:57:58,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:58,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205066944] [2021-02-19 18:57:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:59,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205066944] [2021-02-19 18:57:59,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316724523] [2021-02-19 18:57:59,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:59,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:59,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:57:59,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:59,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:57:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-02-19 18:57:59,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:59,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:59,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:59,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 18:57:59,627 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 35 treesize of output 27 [2021-02-19 18:57:59,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:59,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:59,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:59,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:57:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:59,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:59,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:57:59,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266688087] [2021-02-19 18:57:59,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:57:59,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:57:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:57:59,689 INFO L87 Difference]: Start difference. First operand 38345 states and 158380 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:02,613 INFO L93 Difference]: Finished difference Result 80961 states and 328604 transitions. [2021-02-19 18:58:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:58:02,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:02,852 INFO L225 Difference]: With dead ends: 80961 [2021-02-19 18:58:02,852 INFO L226 Difference]: Without dead ends: 80745 [2021-02-19 18:58:02,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:58:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80745 states. [2021-02-19 18:58:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80745 to 37964. [2021-02-19 18:58:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37964 states, 37963 states have (on average 4.132681821773833) internal successors, (156889), 37963 states have internal predecessors, (156889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37964 states to 37964 states and 156889 transitions. [2021-02-19 18:58:04,099 INFO L78 Accepts]: Start accepts. Automaton has 37964 states and 156889 transitions. Word has length 39 [2021-02-19 18:58:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:04,099 INFO L480 AbstractCegarLoop]: Abstraction has 37964 states and 156889 transitions. [2021-02-19 18:58:04,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37964 states and 156889 transitions. [2021-02-19 18:58:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:04,168 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:04,168 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:04,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 18:58:04,370 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2117577039, now seen corresponding path program 51 times [2021-02-19 18:58:04,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:04,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111897872] [2021-02-19 18:58:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111897872] [2021-02-19 18:58:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014046068] [2021-02-19 18:58:04,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:04,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:58:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:58:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:04,998 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 37 treesize of output 29 [2021-02-19 18:58:04,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:05,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:05,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:05,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-02-19 18:58:05,044 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:58:05,044 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 38 treesize of output 22 [2021-02-19 18:58:05,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:05,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:05,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:05,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:12 [2021-02-19 18:58:05,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:05,126 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 16 [2021-02-19 18:58:05,128 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:05,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:05,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:05,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:58:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:05,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:05,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:58:05,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875071634] [2021-02-19 18:58:05,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:58:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:58:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:58:05,194 INFO L87 Difference]: Start difference. First operand 37964 states and 156889 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:08,100 INFO L93 Difference]: Finished difference Result 74334 states and 304534 transitions. [2021-02-19 18:58:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:58:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:08,588 INFO L225 Difference]: With dead ends: 74334 [2021-02-19 18:58:08,589 INFO L226 Difference]: Without dead ends: 74279 [2021-02-19 18:58:08,589 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:58:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74279 states. [2021-02-19 18:58:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74279 to 38308. [2021-02-19 18:58:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.134936173545305) internal successors, (158397), 38307 states have internal predecessors, (158397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 158397 transitions. [2021-02-19 18:58:09,821 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 158397 transitions. Word has length 39 [2021-02-19 18:58:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:09,821 INFO L480 AbstractCegarLoop]: Abstraction has 38308 states and 158397 transitions. [2021-02-19 18:58:09,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 158397 transitions. [2021-02-19 18:58:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:09,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:09,907 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:10,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 18:58:10,107 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1539802227, now seen corresponding path program 52 times [2021-02-19 18:58:10,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:10,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787133433] [2021-02-19 18:58:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787133433] [2021-02-19 18:58:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682021431] [2021-02-19 18:58:10,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:10,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:58:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:58:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:10,707 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 37 treesize of output 29 [2021-02-19 18:58:10,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:10,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:10,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:10,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-02-19 18:58:10,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:58:10,801 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 39 treesize of output 27 [2021-02-19 18:58:10,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:10,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:10,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:10,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:58:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:10,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:10,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-02-19 18:58:10,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056369481] [2021-02-19 18:58:10,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:58:10,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:58:10,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:58:10,862 INFO L87 Difference]: Start difference. First operand 38308 states and 158397 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:13,329 INFO L93 Difference]: Finished difference Result 88052 states and 362810 transitions. [2021-02-19 18:58:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:58:13,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:13,596 INFO L225 Difference]: With dead ends: 88052 [2021-02-19 18:58:13,596 INFO L226 Difference]: Without dead ends: 87997 [2021-02-19 18:58:13,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:58:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87997 states. [2021-02-19 18:58:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87997 to 38574. [2021-02-19 18:58:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38574 states, 38573 states have (on average 4.13779068260182) internal successors, (159607), 38573 states have internal predecessors, (159607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38574 states to 38574 states and 159607 transitions. [2021-02-19 18:58:14,836 INFO L78 Accepts]: Start accepts. Automaton has 38574 states and 159607 transitions. Word has length 39 [2021-02-19 18:58:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:14,836 INFO L480 AbstractCegarLoop]: Abstraction has 38574 states and 159607 transitions. [2021-02-19 18:58:14,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38574 states and 159607 transitions. [2021-02-19 18:58:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:14,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:14,907 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:15,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:15,107 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:15,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1336172045, now seen corresponding path program 53 times [2021-02-19 18:58:15,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:15,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100656436] [2021-02-19 18:58:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:15,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100656436] [2021-02-19 18:58:15,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585167011] [2021-02-19 18:58:15,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:15,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:58:15,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:58:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:15,715 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 39 treesize of output 31 [2021-02-19 18:58:15,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:15,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:15,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:15,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:32 [2021-02-19 18:58:15,816 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:58:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-02-19 18:58:15,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:15,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:15,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:15,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:21 [2021-02-19 18:58:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:15,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:15,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:15,876 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 41 [2021-02-19 18:58:15,880 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:15,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:15,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:15,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-02-19 18:58:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:15,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:15,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:58:15,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830593128] [2021-02-19 18:58:15,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:58:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:58:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:58:15,956 INFO L87 Difference]: Start difference. First operand 38574 states and 159607 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:16,734 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 18:58:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:20,095 INFO L93 Difference]: Finished difference Result 85957 states and 352847 transitions. [2021-02-19 18:58:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:58:20,096 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:20,350 INFO L225 Difference]: With dead ends: 85957 [2021-02-19 18:58:20,351 INFO L226 Difference]: Without dead ends: 85902 [2021-02-19 18:58:20,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=368, Invalid=3054, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:58:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85902 states. [2021-02-19 18:58:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85902 to 39105. [2021-02-19 18:58:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39105 states, 39104 states have (on average 4.141264320785598) internal successors, (161940), 39104 states have internal predecessors, (161940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39105 states to 39105 states and 161940 transitions. [2021-02-19 18:58:21,608 INFO L78 Accepts]: Start accepts. Automaton has 39105 states and 161940 transitions. Word has length 39 [2021-02-19 18:58:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:21,608 INFO L480 AbstractCegarLoop]: Abstraction has 39105 states and 161940 transitions. [2021-02-19 18:58:21,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 39105 states and 161940 transitions. [2021-02-19 18:58:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:21,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:21,680 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:21,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:21,882 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash 140842267, now seen corresponding path program 54 times [2021-02-19 18:58:21,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:21,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629883776] [2021-02-19 18:58:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:22,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629883776] [2021-02-19 18:58:22,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918203301] [2021-02-19 18:58:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:22,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:58:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 18:58:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:22,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:22,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 18:58:22,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:22,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:22,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:35 [2021-02-19 18:58:22,874 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 31 treesize of output 23 [2021-02-19 18:58:22,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:22,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:22,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:22,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-02-19 18:58:22,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:22,934 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 9 treesize of output 14 [2021-02-19 18:58:22,936 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:22,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:22,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:22,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-02-19 18:58:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:23,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:23,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 18:58:23,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625372663] [2021-02-19 18:58:23,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:58:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:58:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:58:23,023 INFO L87 Difference]: Start difference. First operand 39105 states and 161940 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:26,547 INFO L93 Difference]: Finished difference Result 79489 states and 324737 transitions. [2021-02-19 18:58:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:58:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:26,993 INFO L225 Difference]: With dead ends: 79489 [2021-02-19 18:58:26,993 INFO L226 Difference]: Without dead ends: 79164 [2021-02-19 18:58:26,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:58:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79164 states. [2021-02-19 18:58:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79164 to 39379. [2021-02-19 18:58:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39379 states, 39378 states have (on average 4.138046625019046) internal successors, (162948), 39378 states have internal predecessors, (162948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39379 states to 39379 states and 162948 transitions. [2021-02-19 18:58:28,250 INFO L78 Accepts]: Start accepts. Automaton has 39379 states and 162948 transitions. Word has length 39 [2021-02-19 18:58:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:28,250 INFO L480 AbstractCegarLoop]: Abstraction has 39379 states and 162948 transitions. [2021-02-19 18:58:28,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39379 states and 162948 transitions. [2021-02-19 18:58:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:28,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:28,323 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:28,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:28,523 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2137038977, now seen corresponding path program 55 times [2021-02-19 18:58:28,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:28,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086192292] [2021-02-19 18:58:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:28,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086192292] [2021-02-19 18:58:28,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417092179] [2021-02-19 18:58:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:28,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:58:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:29,253 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 37 treesize of output 29 [2021-02-19 18:58:29,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:29,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:29,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:29,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:58:29,302 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:58:29,302 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 39 treesize of output 27 [2021-02-19 18:58:29,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:29,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:29,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:29,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:58:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:29,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:29,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:58:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962181514] [2021-02-19 18:58:29,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:58:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:58:29,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:58:29,372 INFO L87 Difference]: Start difference. First operand 39379 states and 162948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:31,616 INFO L93 Difference]: Finished difference Result 85787 states and 348894 transitions. [2021-02-19 18:58:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:58:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:31,887 INFO L225 Difference]: With dead ends: 85787 [2021-02-19 18:58:31,887 INFO L226 Difference]: Without dead ends: 85619 [2021-02-19 18:58:31,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:58:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85619 states. [2021-02-19 18:58:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85619 to 39353. [2021-02-19 18:58:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39353 states, 39352 states have (on average 4.138442772921326) internal successors, (162856), 39352 states have internal predecessors, (162856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39353 states to 39353 states and 162856 transitions. [2021-02-19 18:58:33,201 INFO L78 Accepts]: Start accepts. Automaton has 39353 states and 162856 transitions. Word has length 39 [2021-02-19 18:58:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:33,202 INFO L480 AbstractCegarLoop]: Abstraction has 39353 states and 162856 transitions. [2021-02-19 18:58:33,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39353 states and 162856 transitions. [2021-02-19 18:58:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:33,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:33,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:33,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-02-19 18:58:33,474 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1933118231, now seen corresponding path program 56 times [2021-02-19 18:58:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884121891] [2021-02-19 18:58:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:33,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884121891] [2021-02-19 18:58:33,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494584168] [2021-02-19 18:58:33,911 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 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 [2021-02-19 18:58:33,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:58:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:58:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:34,222 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 37 treesize of output 29 [2021-02-19 18:58:34,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:34,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:34,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:34,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:58:34,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:58:34,273 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 39 treesize of output 27 [2021-02-19 18:58:34,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:34,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:34,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:34,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:58:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:34,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:34,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:58:34,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442916931] [2021-02-19 18:58:34,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:58:34,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:58:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:58:34,344 INFO L87 Difference]: Start difference. First operand 39353 states and 162856 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:34,831 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 18:58:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:36,436 INFO L93 Difference]: Finished difference Result 72494 states and 296010 transitions. [2021-02-19 18:58:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:58:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:36,647 INFO L225 Difference]: With dead ends: 72494 [2021-02-19 18:58:36,647 INFO L226 Difference]: Without dead ends: 72404 [2021-02-19 18:58:36,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:58:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72404 states. [2021-02-19 18:58:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72404 to 39375. [2021-02-19 18:58:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39375 states, 39374 states have (on average 4.142378219129375) internal successors, (163102), 39374 states have internal predecessors, (163102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39375 states to 39375 states and 163102 transitions. [2021-02-19 18:58:37,817 INFO L78 Accepts]: Start accepts. Automaton has 39375 states and 163102 transitions. Word has length 39 [2021-02-19 18:58:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:37,817 INFO L480 AbstractCegarLoop]: Abstraction has 39375 states and 163102 transitions. [2021-02-19 18:58:37,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39375 states and 163102 transitions. [2021-02-19 18:58:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:37,889 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:37,889 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:38,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-02-19 18:58:38,089 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:38,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1699576923, now seen corresponding path program 57 times [2021-02-19 18:58:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:38,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95051520] [2021-02-19 18:58:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:38,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95051520] [2021-02-19 18:58:38,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204697015] [2021-02-19 18:58:38,779 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 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 [2021-02-19 18:58:38,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:58:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:58:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:39,125 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:58:39,125 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 37 treesize of output 21 [2021-02-19 18:58:39,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:39,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:35 [2021-02-19 18:58:39,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:39,240 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 35 treesize of output 43 [2021-02-19 18:58:39,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:39,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:39,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-02-19 18:58:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:39,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-02-19 18:58:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734006201] [2021-02-19 18:58:39,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:58:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:58:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:58:39,412 INFO L87 Difference]: Start difference. First operand 39375 states and 163102 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:41,810 INFO L93 Difference]: Finished difference Result 67013 states and 272996 transitions. [2021-02-19 18:58:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:58:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:42,003 INFO L225 Difference]: With dead ends: 67013 [2021-02-19 18:58:42,003 INFO L226 Difference]: Without dead ends: 66923 [2021-02-19 18:58:42,003 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:58:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66923 states. [2021-02-19 18:58:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66923 to 39505. [2021-02-19 18:58:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39505 states, 39504 states have (on average 4.139985824220332) internal successors, (163546), 39504 states have internal predecessors, (163546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39505 states to 39505 states and 163546 transitions. [2021-02-19 18:58:43,198 INFO L78 Accepts]: Start accepts. Automaton has 39505 states and 163546 transitions. Word has length 39 [2021-02-19 18:58:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:43,198 INFO L480 AbstractCegarLoop]: Abstraction has 39505 states and 163546 transitions. [2021-02-19 18:58:43,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 39505 states and 163546 transitions. [2021-02-19 18:58:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:43,275 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:43,275 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:43,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-02-19 18:58:43,475 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:43,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:43,476 INFO L82 PathProgramCache]: Analyzing trace with hash 17740013, now seen corresponding path program 58 times [2021-02-19 18:58:43,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:43,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290740214] [2021-02-19 18:58:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:43,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290740214] [2021-02-19 18:58:43,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338516795] [2021-02-19 18:58:43,941 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 [2021-02-19 18:58:43,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:58:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:43,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:58:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:44,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:58:44,242 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 33 treesize of output 21 [2021-02-19 18:58:44,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:44,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 18:58:44,339 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 35 treesize of output 27 [2021-02-19 18:58:44,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:44,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:44,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:58:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:44,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:44,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:58:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636197093] [2021-02-19 18:58:44,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:58:44,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:58:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:58:44,410 INFO L87 Difference]: Start difference. First operand 39505 states and 163546 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:46,794 INFO L93 Difference]: Finished difference Result 81432 states and 330942 transitions. [2021-02-19 18:58:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:58:46,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:47,032 INFO L225 Difference]: With dead ends: 81432 [2021-02-19 18:58:47,032 INFO L226 Difference]: Without dead ends: 81248 [2021-02-19 18:58:47,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:58:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81248 states. [2021-02-19 18:58:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81248 to 39399. [2021-02-19 18:58:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39399 states, 39398 states have (on average 4.141986902888472) internal successors, (163186), 39398 states have internal predecessors, (163186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39399 states to 39399 states and 163186 transitions. [2021-02-19 18:58:48,252 INFO L78 Accepts]: Start accepts. Automaton has 39399 states and 163186 transitions. Word has length 39 [2021-02-19 18:58:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:48,252 INFO L480 AbstractCegarLoop]: Abstraction has 39399 states and 163186 transitions. [2021-02-19 18:58:48,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39399 states and 163186 transitions. [2021-02-19 18:58:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:48,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:48,324 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:48,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:48,524 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -445608335, now seen corresponding path program 59 times [2021-02-19 18:58:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:48,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326819342] [2021-02-19 18:58:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:49,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326819342] [2021-02-19 18:58:49,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736038736] [2021-02-19 18:58:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:49,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:58:49,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:58:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,433 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 53 [2021-02-19 18:58:49,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:58:49,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:49,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:52 [2021-02-19 18:58:49,562 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 35 treesize of output 27 [2021-02-19 18:58:49,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:49,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:49,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-02-19 18:58:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:49,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,698 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 20 treesize of output 39 [2021-02-19 18:58:49,703 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:49,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:49,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:49,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 18:58:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:49,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:49,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-02-19 18:58:49,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677673374] [2021-02-19 18:58:49,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:58:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:58:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:58:49,799 INFO L87 Difference]: Start difference. First operand 39399 states and 163186 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:55,145 INFO L93 Difference]: Finished difference Result 72667 states and 296516 transitions. [2021-02-19 18:58:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:58:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:58:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:55,360 INFO L225 Difference]: With dead ends: 72667 [2021-02-19 18:58:55,360 INFO L226 Difference]: Without dead ends: 72326 [2021-02-19 18:58:55,360 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=767, Invalid=4063, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:58:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72326 states. [2021-02-19 18:58:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72326 to 39641. [2021-02-19 18:58:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39641 states, 39640 states have (on average 4.139354187689203) internal successors, (164084), 39640 states have internal predecessors, (164084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39641 states to 39641 states and 164084 transitions. [2021-02-19 18:58:56,510 INFO L78 Accepts]: Start accepts. Automaton has 39641 states and 164084 transitions. Word has length 39 [2021-02-19 18:58:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:56,510 INFO L480 AbstractCegarLoop]: Abstraction has 39641 states and 164084 transitions. [2021-02-19 18:58:56,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 39641 states and 164084 transitions. [2021-02-19 18:58:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:58:56,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:56,582 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:56,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:56,783 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash -535391485, now seen corresponding path program 60 times [2021-02-19 18:58:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:56,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094865335] [2021-02-19 18:58:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:57,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094865335] [2021-02-19 18:58:57,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716261802] [2021-02-19 18:58:57,284 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 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 [2021-02-19 18:58:57,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:58:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:57,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 18:58:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:57,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:57,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-02-19 18:58:57,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:58:57,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:57,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:58:57,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:43 [2021-02-19 18:58:57,812 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 31 treesize of output 23 [2021-02-19 18:58:57,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:57,817 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 19 treesize of output 15 [2021-02-19 18:58:57,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:57,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:57,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-02-19 18:58:57,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:91, output treesize:37 [2021-02-19 18:58:57,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:57,983 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 9 treesize of output 14 [2021-02-19 18:58:57,985 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:57,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:58,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:58:58,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-02-19 18:58:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:58,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:58,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-02-19 18:58:58,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816331301] [2021-02-19 18:58:58,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:58:58,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:58,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:58:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:58:58,080 INFO L87 Difference]: Start difference. First operand 39641 states and 164084 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:59,337 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 18:59:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:03,915 INFO L93 Difference]: Finished difference Result 97507 states and 395953 transitions. [2021-02-19 18:59:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:59:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:04,198 INFO L225 Difference]: With dead ends: 97507 [2021-02-19 18:59:04,198 INFO L226 Difference]: Without dead ends: 97181 [2021-02-19 18:59:04,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=834, Invalid=4136, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:59:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97181 states. [2021-02-19 18:59:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97181 to 39557. [2021-02-19 18:59:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39557 states, 39556 states have (on average 4.140307412276266) internal successors, (163774), 39556 states have internal predecessors, (163774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39557 states to 39557 states and 163774 transitions. [2021-02-19 18:59:05,561 INFO L78 Accepts]: Start accepts. Automaton has 39557 states and 163774 transitions. Word has length 39 [2021-02-19 18:59:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:05,561 INFO L480 AbstractCegarLoop]: Abstraction has 39557 states and 163774 transitions. [2021-02-19 18:59:05,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39557 states and 163774 transitions. [2021-02-19 18:59:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:05,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:05,628 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:05,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:05,829 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash -769309049, now seen corresponding path program 61 times [2021-02-19 18:59:05,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:05,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506535181] [2021-02-19 18:59:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506535181] [2021-02-19 18:59:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242128941] [2021-02-19 18:59:06,323 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 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 [2021-02-19 18:59:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:59:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:06,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 18:59:06,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:06,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:06,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:06,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:59:06,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:59:06,771 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 39 treesize of output 27 [2021-02-19 18:59:06,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:06,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:06,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:06,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:59:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:06,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:06,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:59:06,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999414096] [2021-02-19 18:59:06,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:59:06,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:06,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:59:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:59:06,850 INFO L87 Difference]: Start difference. First operand 39557 states and 163774 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:09,428 INFO L93 Difference]: Finished difference Result 85747 states and 348787 transitions. [2021-02-19 18:59:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:59:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:09,683 INFO L225 Difference]: With dead ends: 85747 [2021-02-19 18:59:09,683 INFO L226 Difference]: Without dead ends: 85595 [2021-02-19 18:59:09,683 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:59:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85595 states. [2021-02-19 18:59:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85595 to 39531. [2021-02-19 18:59:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39531 states, 39530 states have (on average 4.140703263344295) internal successors, (163682), 39530 states have internal predecessors, (163682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39531 states to 39531 states and 163682 transitions. [2021-02-19 18:59:11,339 INFO L78 Accepts]: Start accepts. Automaton has 39531 states and 163682 transitions. Word has length 39 [2021-02-19 18:59:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:11,339 INFO L480 AbstractCegarLoop]: Abstraction has 39531 states and 163682 transitions. [2021-02-19 18:59:11,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 39531 states and 163682 transitions. [2021-02-19 18:59:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:11,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:11,481 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:11,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 18:59:11,694 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash -565388303, now seen corresponding path program 62 times [2021-02-19 18:59:11,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:11,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511309812] [2021-02-19 18:59:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511309812] [2021-02-19 18:59:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868197432] [2021-02-19 18:59:12,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:12,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:59:12,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:59:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:12,782 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 37 treesize of output 29 [2021-02-19 18:59:12,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:12,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:12,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:12,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 18:59:12,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:59:12,842 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 39 treesize of output 27 [2021-02-19 18:59:12,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:12,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:12,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:12,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:59:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:12,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:12,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:59:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562811059] [2021-02-19 18:59:12,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:59:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:59:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:59:12,923 INFO L87 Difference]: Start difference. First operand 39531 states and 163682 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:15,468 INFO L93 Difference]: Finished difference Result 72594 states and 296485 transitions. [2021-02-19 18:59:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:59:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:15,680 INFO L225 Difference]: With dead ends: 72594 [2021-02-19 18:59:15,680 INFO L226 Difference]: Without dead ends: 72504 [2021-02-19 18:59:15,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:59:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72504 states. [2021-02-19 18:59:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72504 to 39403. [2021-02-19 18:59:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39403 states, 39402 states have (on average 4.1422262829298) internal successors, (163212), 39402 states have internal predecessors, (163212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39403 states to 39403 states and 163212 transitions. [2021-02-19 18:59:16,871 INFO L78 Accepts]: Start accepts. Automaton has 39403 states and 163212 transitions. Word has length 39 [2021-02-19 18:59:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:16,871 INFO L480 AbstractCegarLoop]: Abstraction has 39403 states and 163212 transitions. [2021-02-19 18:59:16,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 39403 states and 163212 transitions. [2021-02-19 18:59:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:16,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:16,945 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:17,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-02-19 18:59:17,145 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash -307853255, now seen corresponding path program 63 times [2021-02-19 18:59:17,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:17,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255328428] [2021-02-19 18:59:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255328428] [2021-02-19 18:59:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141579979] [2021-02-19 18:59:17,569 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 [2021-02-19 18:59:17,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:59:17,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:59:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:17,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:17,992 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 30 treesize of output 36 [2021-02-19 18:59:17,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:18,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:18,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:18,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:98 [2021-02-19 18:59:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:18,184 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 32 treesize of output 24 [2021-02-19 18:59:18,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:18,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:18,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:18,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:20 [2021-02-19 18:59:18,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:18,298 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 16 [2021-02-19 18:59:18,300 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:59:18,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:18,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:59:18,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 18:59:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:18,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:18,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-02-19 18:59:18,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136260538] [2021-02-19 18:59:18,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:59:18,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:18,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:59:18,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:59:18,381 INFO L87 Difference]: Start difference. First operand 39403 states and 163212 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:20,106 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 18:59:20,897 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 18:59:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:23,405 INFO L93 Difference]: Finished difference Result 65015 states and 264412 transitions. [2021-02-19 18:59:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:59:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:23,588 INFO L225 Difference]: With dead ends: 65015 [2021-02-19 18:59:23,588 INFO L226 Difference]: Without dead ends: 64964 [2021-02-19 18:59:23,589 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:59:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64964 states. [2021-02-19 18:59:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64964 to 40153. [2021-02-19 18:59:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.139719067543336) internal successors, (166218), 40152 states have internal predecessors, (166218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166218 transitions. [2021-02-19 18:59:24,663 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166218 transitions. Word has length 39 [2021-02-19 18:59:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:24,663 INFO L480 AbstractCegarLoop]: Abstraction has 40153 states and 166218 transitions. [2021-02-19 18:59:24,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166218 transitions. [2021-02-19 18:59:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:24,953 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:24,953 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:25,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:25,163 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1626666219, now seen corresponding path program 64 times [2021-02-19 18:59:25,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:25,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807797356] [2021-02-19 18:59:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:25,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807797356] [2021-02-19 18:59:25,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279384615] [2021-02-19 18:59:25,681 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 [2021-02-19 18:59:25,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:59:25,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:59:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:25,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:59:25,990 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 28 treesize of output 16 [2021-02-19 18:59:25,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:26,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:26,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:26,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-02-19 18:59:26,104 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 35 treesize of output 27 [2021-02-19 18:59:26,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:26,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:26,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:26,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 18:59:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:26,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:26,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:59:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010797984] [2021-02-19 18:59:26,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:59:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:26,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:59:26,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:59:26,186 INFO L87 Difference]: Start difference. First operand 40153 states and 166218 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:29,721 INFO L93 Difference]: Finished difference Result 72769 states and 297413 transitions. [2021-02-19 18:59:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:59:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:29,937 INFO L225 Difference]: With dead ends: 72769 [2021-02-19 18:59:29,937 INFO L226 Difference]: Without dead ends: 72553 [2021-02-19 18:59:29,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:59:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72553 states. [2021-02-19 18:59:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72553 to 40105. [2021-02-19 18:59:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40105 states, 40104 states have (on average 4.139936165968482) internal successors, (166028), 40104 states have internal predecessors, (166028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40105 states to 40105 states and 166028 transitions. [2021-02-19 18:59:31,197 INFO L78 Accepts]: Start accepts. Automaton has 40105 states and 166028 transitions. Word has length 39 [2021-02-19 18:59:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:31,197 INFO L480 AbstractCegarLoop]: Abstraction has 40105 states and 166028 transitions. [2021-02-19 18:59:31,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 40105 states and 166028 transitions. [2021-02-19 18:59:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:31,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:31,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:31,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:31,489 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1465084107, now seen corresponding path program 65 times [2021-02-19 18:59:31,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:31,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073483533] [2021-02-19 18:59:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073483533] [2021-02-19 18:59:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749469433] [2021-02-19 18:59:32,076 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 [2021-02-19 18:59:32,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:59:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:59:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:32,432 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 37 treesize of output 29 [2021-02-19 18:59:32,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:32,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:32,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:59:32,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:28 [2021-02-19 18:59:32,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:32,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 50 [2021-02-19 18:59:32,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:32,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:32,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:59:32,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:28 [2021-02-19 18:59:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:32,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:32,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-02-19 18:59:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445976229] [2021-02-19 18:59:32,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:59:32,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:59:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:59:32,697 INFO L87 Difference]: Start difference. First operand 40105 states and 166028 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:37,501 INFO L93 Difference]: Finished difference Result 77681 states and 317751 transitions. [2021-02-19 18:59:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:59:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:37,730 INFO L225 Difference]: With dead ends: 77681 [2021-02-19 18:59:37,730 INFO L226 Difference]: Without dead ends: 77626 [2021-02-19 18:59:37,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:59:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77626 states. [2021-02-19 18:59:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77626 to 40845. [2021-02-19 18:59:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40845 states, 40844 states have (on average 4.146312799921653) internal successors, (169352), 40844 states have internal predecessors, (169352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40845 states to 40845 states and 169352 transitions. [2021-02-19 18:59:39,218 INFO L78 Accepts]: Start accepts. Automaton has 40845 states and 169352 transitions. Word has length 39 [2021-02-19 18:59:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:39,219 INFO L480 AbstractCegarLoop]: Abstraction has 40845 states and 169352 transitions. [2021-02-19 18:59:39,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40845 states and 169352 transitions. [2021-02-19 18:59:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:39,310 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:39,310 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:39,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 18:59:39,511 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:39,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1783264591, now seen corresponding path program 66 times [2021-02-19 18:59:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:39,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110820480] [2021-02-19 18:59:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:40,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110820480] [2021-02-19 18:59:40,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31405110] [2021-02-19 18:59:40,041 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 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 [2021-02-19 18:59:40,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:59:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:59:40,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:40,517 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 35 treesize of output 27 [2021-02-19 18:59:40,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:40,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:40,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:59:40,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-02-19 18:59:40,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:40,612 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 30 treesize of output 22 [2021-02-19 18:59:40,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:40,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:40,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:40,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-02-19 18:59:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:40,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:40,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 18:59:40,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129394939] [2021-02-19 18:59:40,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:59:40,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:59:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:59:40,761 INFO L87 Difference]: Start difference. First operand 40845 states and 169352 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:42,325 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-02-19 18:59:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:45,169 INFO L93 Difference]: Finished difference Result 99601 states and 405961 transitions. [2021-02-19 18:59:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:59:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:45,517 INFO L225 Difference]: With dead ends: 99601 [2021-02-19 18:59:45,517 INFO L226 Difference]: Without dead ends: 99546 [2021-02-19 18:59:45,517 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:59:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99546 states. [2021-02-19 18:59:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99546 to 40624. [2021-02-19 18:59:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40624 states, 40623 states have (on average 4.140806932033577) internal successors, (168212), 40623 states have internal predecessors, (168212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40624 states to 40624 states and 168212 transitions. [2021-02-19 18:59:47,082 INFO L78 Accepts]: Start accepts. Automaton has 40624 states and 168212 transitions. Word has length 39 [2021-02-19 18:59:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:47,082 INFO L480 AbstractCegarLoop]: Abstraction has 40624 states and 168212 transitions. [2021-02-19 18:59:47,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40624 states and 168212 transitions. [2021-02-19 18:59:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:47,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:47,159 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:47,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:47,360 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2102672137, now seen corresponding path program 67 times [2021-02-19 18:59:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:47,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328713850] [2021-02-19 18:59:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:48,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328713850] [2021-02-19 18:59:48,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933771702] [2021-02-19 18:59:48,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:59:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:48,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:59:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:48,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 18:59:48,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:48,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:48,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:48,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-02-19 18:59:48,724 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:59:48,724 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 39 treesize of output 27 [2021-02-19 18:59:48,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:48,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:48,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:48,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:59:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:48,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-02-19 18:59:48,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523600966] [2021-02-19 18:59:48,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:59:48,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:59:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:59:48,804 INFO L87 Difference]: Start difference. First operand 40624 states and 168212 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:51,990 INFO L93 Difference]: Finished difference Result 92130 states and 379838 transitions. [2021-02-19 18:59:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:59:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:52,296 INFO L225 Difference]: With dead ends: 92130 [2021-02-19 18:59:52,296 INFO L226 Difference]: Without dead ends: 92075 [2021-02-19 18:59:52,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:59:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92075 states. [2021-02-19 18:59:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92075 to 40818. [2021-02-19 18:59:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40818 states, 40817 states have (on average 4.140186686919666) internal successors, (168990), 40817 states have internal predecessors, (168990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40818 states to 40818 states and 168990 transitions. [2021-02-19 18:59:53,753 INFO L78 Accepts]: Start accepts. Automaton has 40818 states and 168990 transitions. Word has length 39 [2021-02-19 18:59:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:53,753 INFO L480 AbstractCegarLoop]: Abstraction has 40818 states and 168990 transitions. [2021-02-19 18:59:53,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40818 states and 168990 transitions. [2021-02-19 18:59:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:59:53,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:53,829 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:54,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-02-19 18:59:54,030 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -683679113, now seen corresponding path program 68 times [2021-02-19 18:59:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841953825] [2021-02-19 18:59:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:54,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841953825] [2021-02-19 18:59:54,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656519625] [2021-02-19 18:59:54,507 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 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 [2021-02-19 18:59:54,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:59:54,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 18:59:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:54,873 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 37 treesize of output 29 [2021-02-19 18:59:54,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:54,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:54,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:54,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-02-19 18:59:55,015 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:59:55,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 18:59:55,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:55,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:55,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:55,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 18:59:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:55,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:55,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-02-19 18:59:55,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292712487] [2021-02-19 18:59:55,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:59:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:55,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:59:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:59:55,092 INFO L87 Difference]: Start difference. First operand 40818 states and 168990 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:58,458 INFO L93 Difference]: Finished difference Result 88852 states and 366195 transitions. [2021-02-19 18:59:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:59:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:59:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:58,740 INFO L225 Difference]: With dead ends: 88852 [2021-02-19 18:59:58,740 INFO L226 Difference]: Without dead ends: 88797 [2021-02-19 18:59:58,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:59:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88797 states. [2021-02-19 18:59:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88797 to 41012. [2021-02-19 19:00:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41012 states, 41011 states have (on average 4.14391260881227) internal successors, (169946), 41011 states have internal predecessors, (169946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41012 states to 41012 states and 169946 transitions. [2021-02-19 19:00:00,189 INFO L78 Accepts]: Start accepts. Automaton has 41012 states and 169946 transitions. Word has length 39 [2021-02-19 19:00:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:00:00,189 INFO L480 AbstractCegarLoop]: Abstraction has 41012 states and 169946 transitions. [2021-02-19 19:00:00,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41012 states and 169946 transitions. [2021-02-19 19:00:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:00:00,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:00:00,271 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:00:00,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:00:00,472 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:00:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:00:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash 793335199, now seen corresponding path program 69 times [2021-02-19 19:00:00,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:00:00,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064678245] [2021-02-19 19:00:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:00:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:00:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064678245] [2021-02-19 19:00:01,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387342066] [2021-02-19 19:00:01,281 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 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 [2021-02-19 19:00:01,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:00:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:00:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:02,404 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:00:02,405 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 35 treesize of output 19 [2021-02-19 19:00:02,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:02,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:02,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:02,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:33 [2021-02-19 19:00:02,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:02,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-02-19 19:00:02,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:02,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:02,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:02,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:106 [2021-02-19 19:00:03,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:03,208 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 16 [2021-02-19 19:00:03,211 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:00:03,265 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-02-19 19:00:03,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-02-19 19:00:03,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 19:00:03,293 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-02-19 19:00:03,294 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 12 [2021-02-19 19:00:03,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:00:03,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 9 [2021-02-19 19:00:03,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,337 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:00:03,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 1 [2021-02-19 19:00:03,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,362 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:00:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 1 [2021-02-19 19:00:03,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:00:03,376 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 9 treesize of output 3 [2021-02-19 19:00:03,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:00:03,384 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,426 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-02-19 19:00:03,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 1 [2021-02-19 19:00:03,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:00:03,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:00:03,445 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 19:00:03,467 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 9 treesize of output 10 [2021-02-19 19:00:03,470 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,708 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:00:03,708 INFO L628 ElimStorePlain]: treesize reduction 53, result has 67.9 percent of original size [2021-02-19 19:00:03,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 19:00:03,728 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:408, output treesize:89 [2021-02-19 19:00:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:04,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:04,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-02-19 19:00:04,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967506111] [2021-02-19 19:00:04,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:00:04,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:04,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:00:04,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:00:04,040 INFO L87 Difference]: Start difference. First operand 41012 states and 169946 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:05,468 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 19:00:05,816 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2021-02-19 19:00:06,421 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 19:00:06,617 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 19:00:07,466 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-02-19 19:00:08,173 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 19:00:08,708 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 19:00:08,952 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-02-19 19:00:09,694 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 19:00:09,958 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 19:00:10,302 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 19:00:11,051 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 19:00:11,631 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-02-19 19:00:12,140 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-02-19 19:00:13,127 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-02-19 19:00:13,449 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-02-19 19:00:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:00:14,382 INFO L93 Difference]: Finished difference Result 74306 states and 301522 transitions. [2021-02-19 19:00:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 19:00:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:00:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:00:14,875 INFO L225 Difference]: With dead ends: 74306 [2021-02-19 19:00:14,875 INFO L226 Difference]: Without dead ends: 74158 [2021-02-19 19:00:14,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=984, Invalid=5022, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 19:00:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74158 states. [2021-02-19 19:00:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74158 to 41222. [2021-02-19 19:00:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41222 states, 41221 states have (on average 4.141287207976517) internal successors, (170708), 41221 states have internal predecessors, (170708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41222 states to 41222 states and 170708 transitions. [2021-02-19 19:00:16,472 INFO L78 Accepts]: Start accepts. Automaton has 41222 states and 170708 transitions. Word has length 39 [2021-02-19 19:00:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:00:16,473 INFO L480 AbstractCegarLoop]: Abstraction has 41222 states and 170708 transitions. [2021-02-19 19:00:16,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 41222 states and 170708 transitions. [2021-02-19 19:00:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:00:16,568 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:00:16,568 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:00:16,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:00:16,784 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:00:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:00:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash -888501711, now seen corresponding path program 70 times [2021-02-19 19:00:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:00:16,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017602141] [2021-02-19 19:00:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:00:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:00:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:17,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017602141] [2021-02-19 19:00:17,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205832011] [2021-02-19 19:00:17,654 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 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 [2021-02-19 19:00:17,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:00:17,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:00:17,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:18,240 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:00:18,241 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 33 treesize of output 21 [2021-02-19 19:00:18,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:18,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:18,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:18,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-02-19 19:00:18,418 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 35 treesize of output 27 [2021-02-19 19:00:18,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:18,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:18,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:18,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 19:00:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:18,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:18,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:00:18,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662477666] [2021-02-19 19:00:18,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:00:18,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:00:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:00:18,555 INFO L87 Difference]: Start difference. First operand 41222 states and 170708 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:19,358 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 19:00:19,883 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-02-19 19:00:21,376 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 19:00:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:00:25,225 INFO L93 Difference]: Finished difference Result 87443 states and 355287 transitions. [2021-02-19 19:00:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:00:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:00:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:00:25,548 INFO L225 Difference]: With dead ends: 87443 [2021-02-19 19:00:25,548 INFO L226 Difference]: Without dead ends: 87219 [2021-02-19 19:00:25,548 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:00:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87219 states. [2021-02-19 19:00:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87219 to 41170. [2021-02-19 19:00:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41170 states, 41169 states have (on average 4.1422915300347345) internal successors, (170534), 41169 states have internal predecessors, (170534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41170 states to 41170 states and 170534 transitions. [2021-02-19 19:00:27,151 INFO L78 Accepts]: Start accepts. Automaton has 41170 states and 170534 transitions. Word has length 39 [2021-02-19 19:00:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:00:27,151 INFO L480 AbstractCegarLoop]: Abstraction has 41170 states and 170534 transitions. [2021-02-19 19:00:27,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41170 states and 170534 transitions. [2021-02-19 19:00:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:00:27,240 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:00:27,240 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:00:27,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:00:27,454 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:00:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:00:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1484546045, now seen corresponding path program 71 times [2021-02-19 19:00:27,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:00:27,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834592685] [2021-02-19 19:00:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:00:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:00:28,219 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:00:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:28,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834592685] [2021-02-19 19:00:28,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047796056] [2021-02-19 19:00:28,467 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 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 [2021-02-19 19:00:28,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:00:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:00:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:29,240 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 19:00:29,662 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 39 treesize of output 31 [2021-02-19 19:00:29,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:29,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:29,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:29,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:54 [2021-02-19 19:00:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:29,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:29,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-02-19 19:00:29,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:00:29,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:29,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:29,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:43 [2021-02-19 19:00:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:30,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:30,225 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 20 treesize of output 39 [2021-02-19 19:00:30,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:00:30,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:30,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:00:30,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-02-19 19:00:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:30,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:30,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:00:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115495229] [2021-02-19 19:00:30,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:00:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:00:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:00:30,410 INFO L87 Difference]: Start difference. First operand 41170 states and 170534 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:30,794 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 19:00:31,780 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-02-19 19:00:32,434 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 19:00:32,930 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-02-19 19:00:33,170 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-02-19 19:00:33,525 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 19:00:33,983 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-02-19 19:00:34,451 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 19:00:34,753 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 19:00:35,375 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-02-19 19:00:35,628 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-02-19 19:00:35,911 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-02-19 19:00:36,129 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-02-19 19:00:36,601 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 19:00:38,091 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-02-19 19:00:38,610 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-02-19 19:00:39,031 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 19:00:39,253 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-02-19 19:00:39,925 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:00:40,853 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-02-19 19:00:42,990 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 19:00:43,813 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 19:00:44,178 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-02-19 19:00:44,627 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 19:00:45,040 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 19:00:45,275 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 19:00:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:00:48,381 INFO L93 Difference]: Finished difference Result 104017 states and 421549 transitions. [2021-02-19 19:00:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-02-19 19:00:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:00:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:00:48,736 INFO L225 Difference]: With dead ends: 104017 [2021-02-19 19:00:48,737 INFO L226 Difference]: Without dead ends: 103534 [2021-02-19 19:00:48,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3369 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1536, Invalid=9176, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 19:00:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103534 states. [2021-02-19 19:00:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103534 to 41442. [2021-02-19 19:00:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41442 states, 41441 states have (on average 4.141019763036606) internal successors, (171608), 41441 states have internal predecessors, (171608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41442 states to 41442 states and 171608 transitions. [2021-02-19 19:00:50,325 INFO L78 Accepts]: Start accepts. Automaton has 41442 states and 171608 transitions. Word has length 39 [2021-02-19 19:00:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:00:50,325 INFO L480 AbstractCegarLoop]: Abstraction has 41442 states and 171608 transitions. [2021-02-19 19:00:50,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 41442 states and 171608 transitions. [2021-02-19 19:00:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:00:50,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:00:50,419 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:00:50,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-02-19 19:00:50,635 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:00:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:00:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1280625299, now seen corresponding path program 72 times [2021-02-19 19:00:50,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:00:50,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955685489] [2021-02-19 19:00:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:00:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:00:51,271 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:00:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955685489] [2021-02-19 19:00:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793241439] [2021-02-19 19:00:51,511 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 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 [2021-02-19 19:00:51,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:00:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:00:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:52,159 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 39 treesize of output 31 [2021-02-19 19:00:52,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:52,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:52,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:52,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-02-19 19:00:52,622 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 19:00:52,634 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:00:52,634 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 41 treesize of output 29 [2021-02-19 19:00:52,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:52,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:52,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:52,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-02-19 19:00:52,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:52,745 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 5 [2021-02-19 19:00:52,749 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:00:52,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:52,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:52,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-02-19 19:00:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:52,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:52,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:00:52,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202732356] [2021-02-19 19:00:52,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:00:52,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:52,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:00:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:00:52,856 INFO L87 Difference]: Start difference. First operand 41442 states and 171608 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:00:53,443 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 19:00:53,925 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:00:54,900 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 19:00:55,946 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 19:00:56,141 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:00:56,801 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 19:00:57,436 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-02-19 19:00:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:00:59,698 INFO L93 Difference]: Finished difference Result 70422 states and 287124 transitions. [2021-02-19 19:00:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:00:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:00:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:00:59,906 INFO L225 Difference]: With dead ends: 70422 [2021-02-19 19:00:59,906 INFO L226 Difference]: Without dead ends: 70332 [2021-02-19 19:00:59,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=410, Invalid=2040, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:00:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70332 states. [2021-02-19 19:01:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70332 to 41646. [2021-02-19 19:01:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41646 states, 41645 states have (on average 4.14013687117301) internal successors, (172416), 41645 states have internal predecessors, (172416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41646 states to 41646 states and 172416 transitions. [2021-02-19 19:01:01,319 INFO L78 Accepts]: Start accepts. Automaton has 41646 states and 172416 transitions. Word has length 39 [2021-02-19 19:01:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:01,319 INFO L480 AbstractCegarLoop]: Abstraction has 41646 states and 172416 transitions. [2021-02-19 19:01:01,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41646 states and 172416 transitions. [2021-02-19 19:01:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:01,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:01,406 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:01,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:01:01,621 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1416580073, now seen corresponding path program 73 times [2021-02-19 19:01:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:01,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335311548] [2021-02-19 19:01:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:01,877 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-02-19 19:01:02,413 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:01:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:02,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335311548] [2021-02-19 19:01:02,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359385051] [2021-02-19 19:01:02,632 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 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 [2021-02-19 19:01:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:01:02,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:01:03,242 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 37 treesize of output 29 [2021-02-19 19:01:03,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:03,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:03,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:03,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 19:01:03,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:01:03,339 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 39 treesize of output 27 [2021-02-19 19:01:03,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:03,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:03,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:03,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 19:01:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:03,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:03,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:01:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067783268] [2021-02-19 19:01:03,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:01:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:01:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:01:03,486 INFO L87 Difference]: Start difference. First operand 41646 states and 172416 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:04,345 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 19:01:04,872 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 19:01:05,879 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 19:01:06,133 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 19:01:07,118 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 19:01:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:01:08,856 INFO L93 Difference]: Finished difference Result 105498 states and 428323 transitions. [2021-02-19 19:01:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:01:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:01:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:01:09,174 INFO L225 Difference]: With dead ends: 105498 [2021-02-19 19:01:09,174 INFO L226 Difference]: Without dead ends: 105362 [2021-02-19 19:01:09,175 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:01:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105362 states. [2021-02-19 19:01:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105362 to 41240. [2021-02-19 19:01:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41240 states, 41239 states have (on average 4.142825965712069) internal successors, (170846), 41239 states have internal predecessors, (170846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41240 states to 41240 states and 170846 transitions. [2021-02-19 19:01:10,975 INFO L78 Accepts]: Start accepts. Automaton has 41240 states and 170846 transitions. Word has length 39 [2021-02-19 19:01:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:10,975 INFO L480 AbstractCegarLoop]: Abstraction has 41240 states and 170846 transitions. [2021-02-19 19:01:10,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41240 states and 170846 transitions. [2021-02-19 19:01:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:11,057 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:11,057 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:11,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:01:11,258 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 483684405, now seen corresponding path program 74 times [2021-02-19 19:01:11,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:11,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861396998] [2021-02-19 19:01:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861396998] [2021-02-19 19:01:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113956607] [2021-02-19 19:01:11,836 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 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 [2021-02-19 19:01:11,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:01:11,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:01:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 19:01:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:01:12,232 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 37 treesize of output 29 [2021-02-19 19:01:12,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:12,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:12,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:12,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-02-19 19:01:12,384 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:01:12,385 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 34 treesize of output 22 [2021-02-19 19:01:12,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:12,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:12,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:12,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-02-19 19:01:12,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:12,558 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-02-19 19:01:12,561 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:01:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:12,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:01:12,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-02-19 19:01:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:12,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:12,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 19:01:12,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362367676] [2021-02-19 19:01:12,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:01:12,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:01:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:01:12,687 INFO L87 Difference]: Start difference. First operand 41240 states and 170846 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:01:17,604 INFO L93 Difference]: Finished difference Result 96791 states and 398505 transitions. [2021-02-19 19:01:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:01:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:01:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:01:17,876 INFO L225 Difference]: With dead ends: 96791 [2021-02-19 19:01:17,876 INFO L226 Difference]: Without dead ends: 96736 [2021-02-19 19:01:17,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:01:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96736 states. [2021-02-19 19:01:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96736 to 43023. [2021-02-19 19:01:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43023 states, 43022 states have (on average 4.1411138487285575) internal successors, (178159), 43022 states have internal predecessors, (178159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43023 states to 43023 states and 178159 transitions. [2021-02-19 19:01:19,210 INFO L78 Accepts]: Start accepts. Automaton has 43023 states and 178159 transitions. Word has length 39 [2021-02-19 19:01:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 43023 states and 178159 transitions. [2021-02-19 19:01:19,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 43023 states and 178159 transitions. [2021-02-19 19:01:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:19,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:19,283 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:19,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-02-19 19:01:19,483 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash -153903625, now seen corresponding path program 75 times [2021-02-19 19:01:19,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:19,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059975504] [2021-02-19 19:01:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:20,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059975504] [2021-02-19 19:01:20,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098730562] [2021-02-19 19:01:20,151 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 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 [2021-02-19 19:01:20,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:01:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:01:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:01:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:01:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:20,784 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 37 treesize of output 29 [2021-02-19 19:01:20,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:20,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:20,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:20,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:26 [2021-02-19 19:01:21,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:01:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-02-19 19:01:21,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:21,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:21,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:21,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-02-19 19:01:21,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-02-19 19:01:21,394 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 19:01:21,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:21,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:21,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-02-19 19:01:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:21,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:21,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:01:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39960627] [2021-02-19 19:01:21,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:01:21,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:01:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:01:21,526 INFO L87 Difference]: Start difference. First operand 43023 states and 178159 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:24,618 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 19:01:25,722 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-02-19 19:01:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:01:28,632 INFO L93 Difference]: Finished difference Result 89078 states and 364944 transitions. [2021-02-19 19:01:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:01:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:01:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:01:28,928 INFO L225 Difference]: With dead ends: 89078 [2021-02-19 19:01:28,928 INFO L226 Difference]: Without dead ends: 89027 [2021-02-19 19:01:28,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=482, Invalid=3550, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:01:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89027 states. [2021-02-19 19:01:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89027 to 43407. [2021-02-19 19:01:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43407 states, 43406 states have (on average 4.138920886513385) internal successors, (179654), 43406 states have internal predecessors, (179654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43407 states to 43407 states and 179654 transitions. [2021-02-19 19:01:30,367 INFO L78 Accepts]: Start accepts. Automaton has 43407 states and 179654 transitions. Word has length 39 [2021-02-19 19:01:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:30,368 INFO L480 AbstractCegarLoop]: Abstraction has 43407 states and 179654 transitions. [2021-02-19 19:01:30,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43407 states and 179654 transitions. [2021-02-19 19:01:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:30,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:30,453 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:30,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:01:30,679 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1265089399, now seen corresponding path program 76 times [2021-02-19 19:01:30,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:30,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400504479] [2021-02-19 19:01:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:30,990 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 19:01:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:31,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400504479] [2021-02-19 19:01:31,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679141562] [2021-02-19 19:01:31,728 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 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 [2021-02-19 19:01:31,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:01:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:01:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:01:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:01:32,220 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 37 treesize of output 29 [2021-02-19 19:01:32,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:32,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:32,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:32,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-02-19 19:01:32,534 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:01:32,534 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 39 treesize of output 27 [2021-02-19 19:01:32,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:32,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:32,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:32,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 19:01:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:32,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:32,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-02-19 19:01:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548968491] [2021-02-19 19:01:32,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:01:32,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:32,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:01:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:01:32,669 INFO L87 Difference]: Start difference. First operand 43407 states and 179654 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:34,990 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-19 19:01:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:01:38,780 INFO L93 Difference]: Finished difference Result 95281 states and 392442 transitions. [2021-02-19 19:01:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:01:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:01:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:01:39,087 INFO L225 Difference]: With dead ends: 95281 [2021-02-19 19:01:39,088 INFO L226 Difference]: Without dead ends: 95226 [2021-02-19 19:01:39,088 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:01:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95226 states. [2021-02-19 19:01:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95226 to 45438. [2021-02-19 19:01:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45438 states, 45437 states have (on average 4.142020820036534) internal successors, (188201), 45437 states have internal predecessors, (188201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45438 states to 45438 states and 188201 transitions. [2021-02-19 19:01:41,092 INFO L78 Accepts]: Start accepts. Automaton has 45438 states and 188201 transitions. Word has length 39 [2021-02-19 19:01:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:41,092 INFO L480 AbstractCegarLoop]: Abstraction has 45438 states and 188201 transitions. [2021-02-19 19:01:41,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 45438 states and 188201 transitions. [2021-02-19 19:01:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:41,184 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:41,184 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:41,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:01:41,398 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1958711351, now seen corresponding path program 77 times [2021-02-19 19:01:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:41,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197681822] [2021-02-19 19:01:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197681822] [2021-02-19 19:01:42,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23090401] [2021-02-19 19:01:42,267 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:01:42,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:01:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:01:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:01:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:01:42,813 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 37 treesize of output 29 [2021-02-19 19:01:42,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:42,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:42,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:01:42,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:36 [2021-02-19 19:01:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:43,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:01:43,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:43,343 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 37 treesize of output 55 [2021-02-19 19:01:43,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:01:43,433 INFO L628 ElimStorePlain]: treesize reduction 22, result has 63.3 percent of original size [2021-02-19 19:01:43,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:01:43,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:26 [2021-02-19 19:01:43,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:01:43,681 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 9 treesize of output 5 [2021-02-19 19:01:43,688 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:01:43,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:43,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:43,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-02-19 19:01:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:43,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:43,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-02-19 19:01:43,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604007503] [2021-02-19 19:01:43,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:01:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:01:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:01:43,780 INFO L87 Difference]: Start difference. First operand 45438 states and 188201 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:44,255 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 19:01:44,487 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 19:01:45,644 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 19:01:46,322 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 19:01:46,856 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 19:01:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:01:54,660 INFO L93 Difference]: Finished difference Result 88747 states and 363603 transitions. [2021-02-19 19:01:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:01:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:01:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:01:54,940 INFO L225 Difference]: With dead ends: 88747 [2021-02-19 19:01:54,940 INFO L226 Difference]: Without dead ends: 88692 [2021-02-19 19:01:54,941 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=380, Invalid=3280, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:01:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88692 states. [2021-02-19 19:01:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88692 to 45898. [2021-02-19 19:01:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45898 states, 45897 states have (on average 4.142318670065581) internal successors, (190120), 45897 states have internal predecessors, (190120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45898 states to 45898 states and 190120 transitions. [2021-02-19 19:01:57,078 INFO L78 Accepts]: Start accepts. Automaton has 45898 states and 190120 transitions. Word has length 39 [2021-02-19 19:01:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:01:57,078 INFO L480 AbstractCegarLoop]: Abstraction has 45898 states and 190120 transitions. [2021-02-19 19:01:57,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:01:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 45898 states and 190120 transitions. [2021-02-19 19:01:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:01:57,162 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:01:57,162 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:01:57,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-02-19 19:01:57,378 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:01:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:01:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash -917262921, now seen corresponding path program 78 times [2021-02-19 19:01:57,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:01:57,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635764134] [2021-02-19 19:01:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:01:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:01:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:58,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635764134] [2021-02-19 19:01:58,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182885036] [2021-02-19 19:01:58,182 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 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 [2021-02-19 19:01:58,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:01:58,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:01:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:01:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:01:58,721 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 37 treesize of output 29 [2021-02-19 19:01:58,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:58,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:58,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:58,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-02-19 19:01:59,061 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:01:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-02-19 19:01:59,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:01:59,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:01:59,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:01:59,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 19:01:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:01:59,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:01:59,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-02-19 19:01:59,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885554979] [2021-02-19 19:01:59,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:01:59,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:01:59,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:01:59,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:01:59,202 INFO L87 Difference]: Start difference. First operand 45898 states and 190120 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:02:04,981 INFO L93 Difference]: Finished difference Result 96690 states and 398864 transitions. [2021-02-19 19:02:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:02:04,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:02:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:02:05,285 INFO L225 Difference]: With dead ends: 96690 [2021-02-19 19:02:05,285 INFO L226 Difference]: Without dead ends: 96635 [2021-02-19 19:02:05,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:02:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96635 states. [2021-02-19 19:02:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96635 to 46258. [2021-02-19 19:02:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46258 states, 46257 states have (on average 4.143718788507686) internal successors, (191676), 46257 states have internal predecessors, (191676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46258 states to 46258 states and 191676 transitions. [2021-02-19 19:02:06,970 INFO L78 Accepts]: Start accepts. Automaton has 46258 states and 191676 transitions. Word has length 39 [2021-02-19 19:02:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:02:06,970 INFO L480 AbstractCegarLoop]: Abstraction has 46258 states and 191676 transitions. [2021-02-19 19:02:06,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 46258 states and 191676 transitions. [2021-02-19 19:02:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:02:07,051 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:02:07,051 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:02:07,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:02:07,266 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:02:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:02:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -251556169, now seen corresponding path program 79 times [2021-02-19 19:02:07,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:02:07,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567513623] [2021-02-19 19:02:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:02:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:07,466 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-02-19 19:02:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:08,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567513623] [2021-02-19 19:02:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685609012] [2021-02-19 19:02:08,121 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 [2021-02-19 19:02:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:02:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:02:09,316 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 37 treesize of output 29 [2021-02-19 19:02:09,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:09,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:09,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:09,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-02-19 19:02:09,574 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:02:09,574 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 34 treesize of output 22 [2021-02-19 19:02:09,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:09,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:09,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:09,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-02-19 19:02:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:09,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:02:09,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-02-19 19:02:09,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879259978] [2021-02-19 19:02:09,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:02:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:02:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:02:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:02:09,740 INFO L87 Difference]: Start difference. First operand 46258 states and 191676 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:02:14,454 INFO L93 Difference]: Finished difference Result 86789 states and 357699 transitions. [2021-02-19 19:02:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:02:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:02:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:02:14,988 INFO L225 Difference]: With dead ends: 86789 [2021-02-19 19:02:14,988 INFO L226 Difference]: Without dead ends: 86734 [2021-02-19 19:02:14,988 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:02:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86734 states. [2021-02-19 19:02:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86734 to 46552. [2021-02-19 19:02:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46552 states, 46551 states have (on average 4.144400764752637) internal successors, (192926), 46551 states have internal predecessors, (192926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46552 states to 46552 states and 192926 transitions. [2021-02-19 19:02:16,576 INFO L78 Accepts]: Start accepts. Automaton has 46552 states and 192926 transitions. Word has length 39 [2021-02-19 19:02:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:02:16,576 INFO L480 AbstractCegarLoop]: Abstraction has 46552 states and 192926 transitions. [2021-02-19 19:02:16,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 46552 states and 192926 transitions. [2021-02-19 19:02:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:02:16,660 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:02:16,661 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:02:16,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:02:16,876 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:02:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:02:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1191924179, now seen corresponding path program 80 times [2021-02-19 19:02:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:02:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916807871] [2021-02-19 19:02:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:02:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:17,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916807871] [2021-02-19 19:02:17,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130081734] [2021-02-19 19:02:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:02:17,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:02:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:02:17,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:02:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:02:18,278 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 37 treesize of output 29 [2021-02-19 19:02:18,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:18,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:18,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:18,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-02-19 19:02:18,577 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:02:18,577 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 39 treesize of output 27 [2021-02-19 19:02:18,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:18,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:18,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:18,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 19:02:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:18,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:02:18,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:02:18,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822098438] [2021-02-19 19:02:18,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:02:18,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:02:18,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:02:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:02:18,748 INFO L87 Difference]: Start difference. First operand 46552 states and 192926 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:19,251 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 19:02:20,490 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:02:24,269 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 19:02:24,765 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 19:02:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:02:26,581 INFO L93 Difference]: Finished difference Result 144714 states and 587192 transitions. [2021-02-19 19:02:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:02:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:02:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:02:27,636 INFO L225 Difference]: With dead ends: 144714 [2021-02-19 19:02:27,636 INFO L226 Difference]: Without dead ends: 144659 [2021-02-19 19:02:27,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:02:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144659 states. [2021-02-19 19:02:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144659 to 46116. [2021-02-19 19:02:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46116 states, 46115 states have (on average 4.144183020709097) internal successors, (191109), 46115 states have internal predecessors, (191109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46116 states to 46116 states and 191109 transitions. [2021-02-19 19:02:29,495 INFO L78 Accepts]: Start accepts. Automaton has 46116 states and 191109 transitions. Word has length 39 [2021-02-19 19:02:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:02:29,495 INFO L480 AbstractCegarLoop]: Abstraction has 46116 states and 191109 transitions. [2021-02-19 19:02:29,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 46116 states and 191109 transitions. [2021-02-19 19:02:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:02:29,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:02:29,574 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:02:29,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:02:29,774 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:02:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:02:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1466615845, now seen corresponding path program 81 times [2021-02-19 19:02:29,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:02:29,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59500987] [2021-02-19 19:02:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:02:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:30,497 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:02:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59500987] [2021-02-19 19:02:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36805924] [2021-02-19 19:02:30,854 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 [2021-02-19 19:02:30,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:02:30,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:02:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 19:02:30,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:02:31,546 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 19:02:31,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-02-19 19:02:31,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:31,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:31,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:31,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-02-19 19:02:31,686 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 35 treesize of output 27 [2021-02-19 19:02:31,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:31,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:31,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:31,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-02-19 19:02:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:31,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:02:31,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:02:31,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74253761] [2021-02-19 19:02:31,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:02:31,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:02:31,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:02:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:02:31,882 INFO L87 Difference]: Start difference. First operand 46116 states and 191109 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:33,137 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-02-19 19:02:33,853 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 19:02:34,124 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-02-19 19:02:34,540 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:02:35,189 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-02-19 19:02:35,813 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:02:36,284 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 19:02:36,927 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 19:02:37,373 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 19:02:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:02:39,571 INFO L93 Difference]: Finished difference Result 80268 states and 328293 transitions. [2021-02-19 19:02:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:02:39,574 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:02:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:02:39,815 INFO L225 Difference]: With dead ends: 80268 [2021-02-19 19:02:39,816 INFO L226 Difference]: Without dead ends: 80020 [2021-02-19 19:02:39,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:02:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80020 states. [2021-02-19 19:02:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80020 to 46418. [2021-02-19 19:02:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46418 states, 46417 states have (on average 4.141521425339854) internal successors, (192237), 46417 states have internal predecessors, (192237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46418 states to 46418 states and 192237 transitions. [2021-02-19 19:02:41,568 INFO L78 Accepts]: Start accepts. Automaton has 46418 states and 192237 transitions. Word has length 39 [2021-02-19 19:02:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:02:41,568 INFO L480 AbstractCegarLoop]: Abstraction has 46418 states and 192237 transitions. [2021-02-19 19:02:41,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 46418 states and 192237 transitions. [2021-02-19 19:02:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:02:41,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:02:41,656 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:02:41,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-02-19 19:02:41,857 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:02:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:02:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 550470207, now seen corresponding path program 82 times [2021-02-19 19:02:41,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:02:41,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55356313] [2021-02-19 19:02:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:02:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:42,583 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:02:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:42,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55356313] [2021-02-19 19:02:42,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878651715] [2021-02-19 19:02:42,833 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 [2021-02-19 19:02:42,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:02:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:02:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:02:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:02:43,471 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 37 treesize of output 29 [2021-02-19 19:02:43,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:43,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:43,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:43,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-02-19 19:02:43,581 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 19:02:43,581 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 39 treesize of output 27 [2021-02-19 19:02:43,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:43,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:43,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:02:43,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-02-19 19:02:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:43,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:02:43,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-02-19 19:02:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216499854] [2021-02-19 19:02:43,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:02:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:02:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:02:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:02:43,741 INFO L87 Difference]: Start difference. First operand 46418 states and 192237 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:44,644 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 19:02:45,192 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:02:47,303 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 19:02:48,333 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 19:02:48,712 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:02:49,296 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 19:02:50,583 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 19:02:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:02:52,104 INFO L93 Difference]: Finished difference Result 97950 states and 399224 transitions. [2021-02-19 19:02:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:02:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:02:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:02:52,416 INFO L225 Difference]: With dead ends: 97950 [2021-02-19 19:02:52,416 INFO L226 Difference]: Without dead ends: 97782 [2021-02-19 19:02:52,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=454, Invalid=2516, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:02:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97782 states. [2021-02-19 19:02:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97782 to 46462. [2021-02-19 19:02:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46462 states, 46461 states have (on average 4.141473493898108) internal successors, (192417), 46461 states have internal predecessors, (192417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46462 states to 46462 states and 192417 transitions. [2021-02-19 19:02:53,947 INFO L78 Accepts]: Start accepts. Automaton has 46462 states and 192417 transitions. Word has length 39 [2021-02-19 19:02:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:02:53,947 INFO L480 AbstractCegarLoop]: Abstraction has 46462 states and 192417 transitions. [2021-02-19 19:02:53,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 46462 states and 192417 transitions. [2021-02-19 19:02:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:02:54,347 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:02:54,347 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:02:54,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-02-19 19:02:54,547 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:02:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:02:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash 754390953, now seen corresponding path program 83 times [2021-02-19 19:02:54,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:02:54,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789401164] [2021-02-19 19:02:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:02:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:02:55,200 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 19:02:55,362 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:02:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:55,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789401164] [2021-02-19 19:02:55,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489514442] [2021-02-19 19:02:55,624 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 [2021-02-19 19:02:55,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:02:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:02:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:02:55,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:02:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:56,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:56,756 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 41 treesize of output 57 [2021-02-19 19:02:56,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:56,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:56,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 19:02:56,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:114 [2021-02-19 19:02:57,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,080 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 16 treesize of output 10 [2021-02-19 19:02:57,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:57,166 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 41 treesize of output 59 [2021-02-19 19:02:57,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 19:02:57,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:02:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,184 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 30 treesize of output 20 [2021-02-19 19:02:57,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:02:57,382 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 19:02:57,382 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.0 percent of original size [2021-02-19 19:02:57,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:02:57,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:147, output treesize:58 [2021-02-19 19:02:57,579 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 19:02:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:02:57,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:57,702 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 41 [2021-02-19 19:02:57,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 19:02:57,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:02:57,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:02:57,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:60 [2021-02-19 19:02:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:02:58,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:02:58,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:02:58,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798643804] [2021-02-19 19:02:58,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:02:58,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:02:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:02:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:02:58,170 INFO L87 Difference]: Start difference. First operand 46462 states and 192417 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:02:58,848 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2021-02-19 19:02:59,234 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-02-19 19:02:59,516 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 19:02:59,868 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-02-19 19:03:00,158 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 19:03:00,729 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2021-02-19 19:03:01,148 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 19:03:01,421 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-02-19 19:03:01,709 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 39 [2021-02-19 19:03:02,042 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-02-19 19:03:02,610 WARN L202 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 19:03:02,901 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 19:03:03,394 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-02-19 19:03:03,720 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2021-02-19 19:03:04,052 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-02-19 19:03:04,291 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 19:03:04,560 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 19:03:04,926 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-02-19 19:03:06,080 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 19:03:06,826 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-02-19 19:03:07,350 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:03:07,891 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 19:03:08,254 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 19:03:09,039 WARN L202 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-02-19 19:03:09,484 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2021-02-19 19:03:09,861 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:03:10,231 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 19:03:10,599 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-02-19 19:03:10,852 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 19:03:11,402 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-02-19 19:03:11,688 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:03:12,180 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 19:03:12,887 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 19:03:13,156 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 19:03:13,377 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 19:03:13,756 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 19:03:14,173 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-02-19 19:03:14,565 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 19:03:15,097 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 19:03:15,467 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 19:03:16,380 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 19:03:16,770 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:03:16,987 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:03:17,437 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-02-19 19:03:17,776 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 19:03:18,300 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 19:03:18,989 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 19:03:19,244 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:03:19,624 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-02-19 19:03:19,919 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-02-19 19:03:20,324 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-02-19 19:03:20,729 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:03:21,153 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 19:03:21,597 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-02-19 19:03:22,606 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-02-19 19:03:23,562 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 19:03:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:03:24,139 INFO L93 Difference]: Finished difference Result 90836 states and 369331 transitions. [2021-02-19 19:03:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-02-19 19:03:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:03:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:03:24,573 INFO L225 Difference]: With dead ends: 90836 [2021-02-19 19:03:24,573 INFO L226 Difference]: Without dead ends: 90579 [2021-02-19 19:03:24,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1662, Invalid=10110, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 19:03:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90579 states. [2021-02-19 19:03:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90579 to 46509. [2021-02-19 19:03:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46509 states, 46508 states have (on average 4.1415240388750325) internal successors, (192614), 46508 states have internal predecessors, (192614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:03:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46509 states to 46509 states and 192614 transitions. [2021-02-19 19:03:25,984 INFO L78 Accepts]: Start accepts. Automaton has 46509 states and 192614 transitions. Word has length 39 [2021-02-19 19:03:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:03:25,984 INFO L480 AbstractCegarLoop]: Abstraction has 46509 states and 192614 transitions. [2021-02-19 19:03:25,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:03:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46509 states and 192614 transitions. [2021-02-19 19:03:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:03:26,065 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:03:26,065 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:03:26,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-02-19 19:03:26,266 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:03:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:03:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1391661891, now seen corresponding path program 84 times [2021-02-19 19:03:26,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:03:26,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551111882] [2021-02-19 19:03:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:03:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:03:26,907 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 19:03:27,075 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 19:03:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:03:27,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551111882] [2021-02-19 19:03:27,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176515282] [2021-02-19 19:03:27,354 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 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 [2021-02-19 19:03:27,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:03:27,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:03:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:03:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-02-19 19:03:28,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-02-19 19:03:28,073 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:03:28,076 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:03:28,076 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:03:28 BasicIcfg [2021-02-19 19:03:28,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:03:28,077 INFO L168 Benchmark]: Toolchain (without parser) took 520876.35 ms. Allocated memory was 255.9 MB in the beginning and 15.3 GB in the end (delta: 15.1 GB). Free memory was 236.5 MB in the beginning and 12.8 GB in the end (delta: -12.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.62 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 INFO L168 Benchmark]: Boogie Preprocessor took 17.31 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 INFO L168 Benchmark]: RCFGBuilder took 234.48 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 233.9 MB in the end (delta: -565.8 kB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 INFO L168 Benchmark]: TraceAbstraction took 520598.88 ms. Allocated memory was 255.9 MB in the beginning and 15.3 GB in the end (delta: 15.1 GB). Free memory was 233.2 MB in the beginning and 12.8 GB in the end (delta: -12.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-02-19 19:03:28,077 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.62 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.31 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 234.48 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 233.9 MB in the end (delta: -565.8 kB). Peak memory consumption was 17.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 520598.88 ms. Allocated memory was 255.9 MB in the beginning and 15.3 GB in the end (delta: 15.1 GB). Free memory was 233.2 MB in the beginning and 12.8 GB in the end (delta: -12.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 81). Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 21 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 520.5s, OverallIterations: 93, TraceHistogramMax: 2, AutomataDifference: 314.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6669 SDtfs, 36631 SDslu, 71557 SDs, 0 SdLazy, 127570 SolverSat, 6869 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 76.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6079 GetRequests, 2349 SyntacticMatches, 90 SemanticMatches, 3640 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54797 ImplicationChecksByTransitivity, 185.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46552occurred in iteration=88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 92.5s AutomataMinimizationTime, 92 MinimizatonAttempts, 2749395 StatesRemovedByMinimization, 92 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 82.9s InterpolantComputationTime, 6523 NumberOfCodeBlocks, 6519 NumberOfCodeBlocksAsserted, 320 NumberOfCheckSat, 6345 ConstructedInterpolants, 270 QuantifiedInterpolants, 5346883 SizeOfPredicates, 604 NumberOfNonLiveVariables, 9635 ConjunctsInSsa, 3063 ConjunctsInUnsatCore, 178 InterpolantComputations, 8 PerfectInterpolantSequences, 222/2676 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