/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/jain_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:20,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:20,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:20,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 17:56:20,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:20,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:20,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:20,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:20,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:20,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:20,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:20,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:20,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:20,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:20,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:20,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:20,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:20,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:20,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:20,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:20,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:56:20,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:20,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:20,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:20,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:20,219 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:20,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:20,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:20,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:20,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:20,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:20,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:20,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:20,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:20,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:20,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:20,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:20,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:20,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:20,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:20,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:20,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:20,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:20,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:20,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:20,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:20,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:20,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:20,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:20,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:20,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:20,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:20,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:20,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:20,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:20,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:20,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/jain_4-2.c [2020-10-23 17:56:20,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595e30504/0ac2d7c559eb4d31a3dc594274ab0157/FLAGfa4a6e510 [2020-10-23 17:56:21,384 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:21,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/jain_4-2.c [2020-10-23 17:56:21,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595e30504/0ac2d7c559eb4d31a3dc594274ab0157/FLAGfa4a6e510 [2020-10-23 17:56:21,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595e30504/0ac2d7c559eb4d31a3dc594274ab0157 [2020-10-23 17:56:21,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:21,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:21,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:21,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:21,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:21,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:21" (1/1) ... [2020-10-23 17:56:21,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7827d886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:21, skipping insertion in model container [2020-10-23 17:56:21,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:21" (1/1) ... [2020-10-23 17:56:21,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:21,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:21,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:21,976 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:21,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:22,010 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:22,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22 WrapperNode [2020-10-23 17:56:22,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:22,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:22,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:22,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:22,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:22,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:22,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:22,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:22,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (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 [2020-10-23 17:56:22,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:22,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:22,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:22,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:22,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:22,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:22,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:22,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:22,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 17:56:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:22,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:22,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:22,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:22,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:22,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:22,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:22,565 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:22,565 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 17:56:22,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:22 BoogieIcfgContainer [2020-10-23 17:56:22,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:22,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:22,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:22,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:22,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:21" (1/3) ... [2020-10-23 17:56:22,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf7ac1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:22, skipping insertion in model container [2020-10-23 17:56:22,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (2/3) ... [2020-10-23 17:56:22,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf7ac1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:22, skipping insertion in model container [2020-10-23 17:56:22,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:22" (3/3) ... [2020-10-23 17:56:22,602 INFO L111 eAbstractionObserver]: Analyzing ICFG jain_4-2.c [2020-10-23 17:56:22,615 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:22,624 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:22,638 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:22,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:22,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:22,680 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:22,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:22,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:22,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:22,680 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:22,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-23 17:56:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 17:56:22,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:22,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:22,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1199457490, now seen corresponding path program 1 times [2020-10-23 17:56:22,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:22,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164967227] [2020-10-23 17:56:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:23,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:56:23,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164967227] [2020-10-23 17:56:23,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:23,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:56:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389214295] [2020-10-23 17:56:23,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:56:23,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:56:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:23,228 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-10-23 17:56:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:23,644 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-23 17:56:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:56:23,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-23 17:56:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:23,654 INFO L225 Difference]: With dead ends: 39 [2020-10-23 17:56:23,654 INFO L226 Difference]: Without dead ends: 22 [2020-10-23 17:56:23,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 17:56:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-23 17:56:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-23 17:56:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 17:56:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-23 17:56:23,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-10-23 17:56:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:23,705 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-23 17:56:23,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:56:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-23 17:56:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 17:56:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:23,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:23,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash -680978417, now seen corresponding path program 1 times [2020-10-23 17:56:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:23,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515784266] [2020-10-23 17:56:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:23,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:23,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:56:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:56:23,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515784266] [2020-10-23 17:56:23,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540706925] [2020-10-23 17:56:23,921 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