/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:28:22,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:28:22,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:28:22,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-19 21:28:22,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:28:22,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:28:22,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:28:22,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:28:22,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:28:22,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:28:22,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:28:22,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:28:22,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:28:22,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:28:22,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:28:22,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:28:22,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:28:22,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:28:22,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:28:22,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:28:22,944 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 [2020-07-19 21:28:22,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:28:22,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:28:22,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:28:22,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:28:22,961 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:28:22,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:28:22,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:28:22,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:28:22,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:28:22,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:28:22,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:28:22,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:28:22,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:28:22,963 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:28:22,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:28:22,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:28:22,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:28:22,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:28:22,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:28:22,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:28:22,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:28:22,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:28:22,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:28:22,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:28:22,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:28:23,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:28:23,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:28:23,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:28:23,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:28:23,259 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:28:23,260 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-19 21:28:23,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e7a17f7/8dfeff51ec8e4268a660a0ed181f7017/FLAG1284a8d98 [2020-07-19 21:28:23,801 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:28:23,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-19 21:28:23,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e7a17f7/8dfeff51ec8e4268a660a0ed181f7017/FLAG1284a8d98 [2020-07-19 21:28:24,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e7a17f7/8dfeff51ec8e4268a660a0ed181f7017 [2020-07-19 21:28:24,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:28:24,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:28:24,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:28:24,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:28:24,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:28:24,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ebf41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24, skipping insertion in model container [2020-07-19 21:28:24,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:28:24,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:28:24,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:28:24,425 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:28:24,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:28:24,455 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:28:24,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24 WrapperNode [2020-07-19 21:28:24,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:28:24,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:28:24,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:28:24,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:28:24,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (1/1) ... [2020-07-19 21:28:24,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:28:24,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:28:24,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:28:24,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:28:24,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (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 [2020-07-19 21:28:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:28:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:28:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-19 21:28:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:28:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:28:24,791 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:28:24,791 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:28:24,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:24 BoogieIcfgContainer [2020-07-19 21:28:24,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:28:24,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:28:24,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:28:24,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:28:24,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:28:24" (1/3) ... [2020-07-19 21:28:24,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:24, skipping insertion in model container [2020-07-19 21:28:24,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:24" (2/3) ... [2020-07-19 21:28:24,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:24, skipping insertion in model container [2020-07-19 21:28:24,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:24" (3/3) ... [2020-07-19 21:28:24,803 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-07-19 21:28:24,814 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:28:24,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:28:24,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:28:24,859 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:28:24,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:28:24,860 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:28:24,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:28:24,860 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:28:24,860 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:28:24,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:28:24,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:28:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 21:28:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:28:24,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:24,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:24,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-19 21:28:24,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:24,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26263499] [2020-07-19 21:28:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:28:25,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26263499] [2020-07-19 21:28:25,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:28:25,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:28:25,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941690928] [2020-07-19 21:28:25,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:28:25,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:28:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:28:25,129 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 21:28:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:25,220 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 21:28:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:28:25,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 21:28:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:25,240 INFO L225 Difference]: With dead ends: 30 [2020-07-19 21:28:25,240 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 21:28:25,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:28:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 21:28:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 21:28:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 21:28:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 21:28:25,309 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 21:28:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 21:28:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:28:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 21:28:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 21:28:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:25,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:25,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:28:25,314 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-19 21:28:25,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:25,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132609275] [2020-07-19 21:28:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:28:25,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132609275] [2020-07-19 21:28:25,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660734240] [2020-07-19 21:28:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:28:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:28:25,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:25,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 21:28:25,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112544480] [2020-07-19 21:28:25,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:28:25,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:25,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:28:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:28:25,592 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-19 21:28:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:25,653 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 21:28:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:28:25,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-19 21:28:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:25,655 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:28:25,656 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 21:28:25,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:28:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 21:28:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 21:28:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:28:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 21:28:25,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 21:28:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:25,668 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 21:28:25,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:28:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 21:28:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:28:25,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:25,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:25,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:28:25,877 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-19 21:28:25,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:25,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139864135] [2020-07-19 21:28:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:28:26,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139864135] [2020-07-19 21:28:26,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44329135] [2020-07-19 21:28:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:28:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:28:26,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:26,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 21:28:26,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784223790] [2020-07-19 21:28:26,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:28:26,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:28:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:28:26,129 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-19 21:28:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:26,196 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 21:28:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:28:26,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-19 21:28:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:26,199 INFO L225 Difference]: With dead ends: 28 [2020-07-19 21:28:26,199 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:28:26,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:28:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:28:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 21:28:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 21:28:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 21:28:26,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 21:28:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:26,208 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 21:28:26,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:28:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 21:28:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:28:26,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:26,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:26,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:26,424 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-19 21:28:26,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:26,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964285050] [2020-07-19 21:28:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:28:26,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964285050] [2020-07-19 21:28:26,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041071615] [2020-07-19 21:28:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:28:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:28:26,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:26,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 21:28:26,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897686071] [2020-07-19 21:28:26,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:28:26,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:28:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:28:26,800 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-19 21:28:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:26,893 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 21:28:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:28:26,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-19 21:28:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:26,896 INFO L225 Difference]: With dead ends: 31 [2020-07-19 21:28:26,896 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:28:26,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:28:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:28:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 21:28:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:28:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 21:28:26,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 21:28:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:26,911 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 21:28:26,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:28:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 21:28:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:28:26,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:26,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:27,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:27,128 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-19 21:28:27,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:27,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968111242] [2020-07-19 21:28:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 21:28:27,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968111242] [2020-07-19 21:28:27,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036392280] [2020-07-19 21:28:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:28:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 21:28:27,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:27,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-19 21:28:27,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783085410] [2020-07-19 21:28:27,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:28:27,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:28:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:28:27,450 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-19 21:28:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:27,530 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 21:28:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:28:27,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-19 21:28:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:27,532 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:28:27,532 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:28:27,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:28:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:28:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:28:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:28:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 21:28:27,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 21:28:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:27,540 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 21:28:27,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:28:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 21:28:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 21:28:27,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:27,542 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:27,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:27,758 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-19 21:28:27,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:27,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425850617] [2020-07-19 21:28:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 21:28:27,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425850617] [2020-07-19 21:28:27,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614646642] [2020-07-19 21:28:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:28:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 21:28:28,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:28,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-19 21:28:28,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457007301] [2020-07-19 21:28:28,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:28:28,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:28:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:28:28,033 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-19 21:28:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:28,162 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 21:28:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:28:28,163 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-19 21:28:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:28,164 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:28:28,164 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 21:28:28,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:28:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 21:28:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 21:28:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:28:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 21:28:28,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 21:28:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:28,173 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 21:28:28,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:28:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 21:28:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 21:28:28,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:28,175 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:28,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 21:28:28,390 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-19 21:28:28,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:28,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205038417] [2020-07-19 21:28:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 21:28:28,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205038417] [2020-07-19 21:28:28,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30995729] [2020-07-19 21:28:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:28:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 21:28:28,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:28,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-19 21:28:28,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418771191] [2020-07-19 21:28:28,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:28:28,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:28:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:28:28,650 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-19 21:28:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:28,747 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 21:28:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:28:28,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-19 21:28:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:28,749 INFO L225 Difference]: With dead ends: 40 [2020-07-19 21:28:28,749 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:28:28,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:28:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:28:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 21:28:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:28:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 21:28:28,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 21:28:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:28,757 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 21:28:28,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:28:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 21:28:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 21:28:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:28,759 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:28,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:28,972 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-19 21:28:28,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:28,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419716266] [2020-07-19 21:28:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 21:28:29,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419716266] [2020-07-19 21:28:29,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944913713] [2020-07-19 21:28:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:28:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 21:28:29,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:29,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-19 21:28:29,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443510210] [2020-07-19 21:28:29,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:28:29,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:29,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:28:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:28:29,282 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-19 21:28:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:29,400 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 21:28:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:28:29,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-19 21:28:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:29,402 INFO L225 Difference]: With dead ends: 43 [2020-07-19 21:28:29,402 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:28:29,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:28:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:28:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 21:28:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:28:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 21:28:29,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 21:28:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:29,410 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 21:28:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:28:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 21:28:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 21:28:29,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:29,411 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:29,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:29,626 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-19 21:28:29,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:29,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548140486] [2020-07-19 21:28:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 21:28:29,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548140486] [2020-07-19 21:28:29,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020360455] [2020-07-19 21:28:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:28:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 21:28:29,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:29,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-19 21:28:29,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639589614] [2020-07-19 21:28:29,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:28:29,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:28:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:28:29,969 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-19 21:28:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:30,112 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 21:28:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:28:30,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-19 21:28:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:30,114 INFO L225 Difference]: With dead ends: 46 [2020-07-19 21:28:30,115 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:28:30,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:28:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:28:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 21:28:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 21:28:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 21:28:30,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 21:28:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:30,122 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 21:28:30,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:28:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 21:28:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 21:28:30,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:30,124 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:30,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 21:28:30,338 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:30,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-19 21:28:30,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:30,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509392229] [2020-07-19 21:28:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 21:28:30,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509392229] [2020-07-19 21:28:30,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032410924] [2020-07-19 21:28:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:28:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 21:28:30,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:30,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-19 21:28:30,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418851879] [2020-07-19 21:28:30,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:28:30,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:28:30,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:28:30,699 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-19 21:28:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:30,838 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 21:28:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:28:30,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-19 21:28:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:30,840 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:28:30,840 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 21:28:30,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:28:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 21:28:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 21:28:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:28:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 21:28:30,847 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 21:28:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:30,848 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 21:28:30,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:28:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 21:28:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 21:28:30,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:30,850 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:31,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:31,065 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-19 21:28:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:31,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947984177] [2020-07-19 21:28:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 21:28:31,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947984177] [2020-07-19 21:28:31,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700885532] [2020-07-19 21:28:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:28:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 21:28:31,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:31,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-19 21:28:31,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639123001] [2020-07-19 21:28:31,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:28:31,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:31,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:28:31,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:28:31,526 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-19 21:28:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:31,682 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 21:28:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:28:31,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-19 21:28:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:31,685 INFO L225 Difference]: With dead ends: 52 [2020-07-19 21:28:31,686 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:28:31,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:28:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:28:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 21:28:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:28:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 21:28:31,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 21:28:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:31,702 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 21:28:31,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:28:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 21:28:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 21:28:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:31,705 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:31,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:31,919 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-19 21:28:31,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:31,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588389303] [2020-07-19 21:28:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 21:28:32,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588389303] [2020-07-19 21:28:32,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418106942] [2020-07-19 21:28:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:28:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 21:28:32,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:32,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-19 21:28:32,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899293197] [2020-07-19 21:28:32,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:28:32,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:28:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:28:32,460 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-19 21:28:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:32,642 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 21:28:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:28:32,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-19 21:28:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:32,644 INFO L225 Difference]: With dead ends: 55 [2020-07-19 21:28:32,644 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 21:28:32,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:28:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 21:28:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 21:28:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:28:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 21:28:32,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 21:28:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:32,661 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 21:28:32,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:28:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 21:28:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 21:28:32,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:32,662 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:32,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 21:28:32,879 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-19 21:28:32,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:32,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356795978] [2020-07-19 21:28:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 21:28:33,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356795978] [2020-07-19 21:28:33,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640643432] [2020-07-19 21:28:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:28:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 21:28:33,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:33,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-19 21:28:33,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389139283] [2020-07-19 21:28:33,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:28:33,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:28:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:28:33,509 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-19 21:28:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:33,711 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 21:28:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:28:33,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-19 21:28:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:33,713 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:28:33,713 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:28:33,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:28:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:28:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 21:28:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 21:28:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 21:28:33,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 21:28:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:33,721 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 21:28:33,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:28:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 21:28:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 21:28:33,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:33,722 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:33,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:28:33,931 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-19 21:28:33,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:33,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929794080] [2020-07-19 21:28:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 21:28:34,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929794080] [2020-07-19 21:28:34,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813676839] [2020-07-19 21:28:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 21:28:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 21:28:34,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:34,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-19 21:28:34,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698079966] [2020-07-19 21:28:34,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:28:34,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:28:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:28:34,473 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-19 21:28:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:34,656 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 21:28:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:28:34,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-19 21:28:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:34,658 INFO L225 Difference]: With dead ends: 61 [2020-07-19 21:28:34,658 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 21:28:34,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:28:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 21:28:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 21:28:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:28:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 21:28:34,664 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 21:28:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:34,664 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 21:28:34,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:28:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 21:28:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 21:28:34,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:34,666 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:34,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:28:34,878 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-19 21:28:34,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640422688] [2020-07-19 21:28:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 21:28:35,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640422688] [2020-07-19 21:28:35,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213749893] [2020-07-19 21:28:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:28:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 21:28:35,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:35,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-19 21:28:35,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144267909] [2020-07-19 21:28:35,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:28:35,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:28:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:28:35,653 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-19 21:28:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:35,853 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 21:28:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:28:35,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-19 21:28:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:35,855 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:28:35,855 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:28:35,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:28:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:28:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 21:28:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 21:28:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 21:28:35,861 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 21:28:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:35,861 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 21:28:35,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:28:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 21:28:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 21:28:35,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:35,863 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:36,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:36,075 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-19 21:28:36,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:36,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082090507] [2020-07-19 21:28:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 21:28:36,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082090507] [2020-07-19 21:28:36,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274991270] [2020-07-19 21:28:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 21:28:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 21:28:36,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:36,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-19 21:28:36,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658194017] [2020-07-19 21:28:36,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:28:36,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:28:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:28:36,880 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-19 21:28:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:37,126 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-19 21:28:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:28:37,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-19 21:28:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:37,129 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:28:37,129 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 21:28:37,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:28:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 21:28:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 21:28:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:28:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-19 21:28:37,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-19 21:28:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:37,141 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-19 21:28:37,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:28:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-19 21:28:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 21:28:37,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:37,143 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:37,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:28:37,358 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:37,358 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-19 21:28:37,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:37,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467692800] [2020-07-19 21:28:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 21:28:38,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467692800] [2020-07-19 21:28:38,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438090674] [2020-07-19 21:28:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 21:28:38,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 21:28:38,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:38,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-19 21:28:38,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182115602] [2020-07-19 21:28:38,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:28:38,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:28:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:28:38,139 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-19 21:28:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:38,362 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-19 21:28:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:28:38,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-19 21:28:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:38,364 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:28:38,364 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:28:38,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 21:28:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:28:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 21:28:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 21:28:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-19 21:28:38,369 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-19 21:28:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:38,370 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-19 21:28:38,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:28:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-19 21:28:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-19 21:28:38,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:38,371 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:38,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:28:38,583 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-19 21:28:38,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:38,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472464197] [2020-07-19 21:28:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 21:28:39,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472464197] [2020-07-19 21:28:39,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226610125] [2020-07-19 21:28:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 21:28:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 21:28:39,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:39,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-07-19 21:28:39,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855748063] [2020-07-19 21:28:39,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:28:39,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:28:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:28:39,415 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-07-19 21:28:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:39,659 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-19 21:28:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:28:39,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-07-19 21:28:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:39,660 INFO L225 Difference]: With dead ends: 73 [2020-07-19 21:28:39,660 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 21:28:39,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:28:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 21:28:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-19 21:28:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 21:28:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-19 21:28:39,666 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-19 21:28:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:39,666 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-19 21:28:39,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:28:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-19 21:28:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-19 21:28:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:39,669 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:39,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:28:39,882 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-19 21:28:39,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:39,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353119882] [2020-07-19 21:28:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 21:28:40,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353119882] [2020-07-19 21:28:40,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445777607] [2020-07-19 21:28:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 21:28:40,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 21:28:40,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:40,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-19 21:28:40,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798489560] [2020-07-19 21:28:40,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:28:40,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:28:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:28:40,878 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-07-19 21:28:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:41,161 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-19 21:28:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:28:41,163 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-19 21:28:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:41,164 INFO L225 Difference]: With dead ends: 76 [2020-07-19 21:28:41,165 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 21:28:41,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:28:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 21:28:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-19 21:28:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 21:28:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-19 21:28:41,173 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-19 21:28:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:41,173 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-19 21:28:41,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:28:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-19 21:28:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-19 21:28:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:41,175 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:41,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:41,387 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-19 21:28:41,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:41,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801700483] [2020-07-19 21:28:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 21:28:42,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801700483] [2020-07-19 21:28:42,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014372434] [2020-07-19 21:28:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 21:28:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 21:28:42,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:42,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-19 21:28:42,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706225448] [2020-07-19 21:28:42,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:28:42,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:28:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:28:42,350 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-19 21:28:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:42,647 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-19 21:28:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:28:42,649 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-19 21:28:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:42,650 INFO L225 Difference]: With dead ends: 79 [2020-07-19 21:28:42,650 INFO L226 Difference]: Without dead ends: 75 [2020-07-19 21:28:42,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:28:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-19 21:28:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-19 21:28:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 21:28:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-19 21:28:42,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-19 21:28:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:42,659 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-19 21:28:42,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:28:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-19 21:28:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-19 21:28:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:42,661 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:42,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:28:42,862 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-19 21:28:42,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767152580] [2020-07-19 21:28:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 21:28:44,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767152580] [2020-07-19 21:28:44,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374970899] [2020-07-19 21:28:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-19 21:28:45,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 21:28:45,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:28:45,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2020-07-19 21:28:45,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250190809] [2020-07-19 21:28:45,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-19 21:28:45,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-19 21:28:45,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:28:45,217 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-07-19 21:28:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:46,028 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-19 21:28:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 21:28:46,029 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-07-19 21:28:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:46,030 INFO L225 Difference]: With dead ends: 82 [2020-07-19 21:28:46,030 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:28:46,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:28:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:28:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-19 21:28:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 21:28:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-19 21:28:46,039 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-19 21:28:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:46,043 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-19 21:28:46,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-19 21:28:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-19 21:28:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-19 21:28:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:28:46,044 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:28:46,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 21:28:46,250 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:28:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:28:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-07-19 21:28:46,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:28:46,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17643536] [2020-07-19 21:28:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-19 21:28:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 21:28:47,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17643536] [2020-07-19 21:28:47,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702557318] [2020-07-19 21:28:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 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 [2020-07-19 21:28:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:28:47,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 21:28:47,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:28:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 21:28:47,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:28:47,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 29 [2020-07-19 21:28:47,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216816317] [2020-07-19 21:28:47,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:28:47,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:28:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:28:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:28:47,377 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-07-19 21:28:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:28:47,869 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-07-19 21:28:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:28:47,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-07-19 21:28:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:28:47,873 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:28:47,873 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:28:47,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=839, Invalid=1711, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:28:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:28:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:28:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:28:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:28:47,878 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-07-19 21:28:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:28:47,878 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:28:47,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:28:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:28:47,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:28:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:28:48,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:28:48,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:28:48,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:28:48,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:28:48,117 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:28:48,117 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:28:48,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:28:48,118 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-19 21:28:48,118 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-19 21:28:48,118 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:28:48,118 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-19 21:28:48,118 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-19 21:28:48,119 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2020-07-19 21:28:48,119 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-19 21:28:48,119 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:28:48,119 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-19 21:28:48,119 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-19 21:28:48,119 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-19 21:28:48,119 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-19 21:28:48,119 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:28:48,120 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-19 21:28:48,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:28:48 BoogieIcfgContainer [2020-07-19 21:28:48,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:28:48,126 INFO L168 Benchmark]: Toolchain (without parser) took 23926.07 ms. Allocated memory was 138.4 MB in the beginning and 533.7 MB in the end (delta: 395.3 MB). Free memory was 103.0 MB in the beginning and 336.5 MB in the end (delta: -233.5 MB). Peak memory consumption was 161.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,127 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.17 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,128 INFO L168 Benchmark]: Boogie Preprocessor took 24.61 ms. Allocated memory is still 138.4 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,128 INFO L168 Benchmark]: RCFGBuilder took 312.95 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 171.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,129 INFO L168 Benchmark]: TraceAbstraction took 23327.88 ms. Allocated memory was 202.4 MB in the beginning and 533.7 MB in the end (delta: 331.4 MB). Free memory was 170.3 MB in the beginning and 336.5 MB in the end (delta: -166.2 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:28:48,131 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.17 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.61 ms. Allocated memory is still 138.4 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.95 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 171.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23327.88 ms. Allocated memory was 202.4 MB in the beginning and 533.7 MB in the end (delta: 331.4 MB). Free memory was 170.3 MB in the beginning and 336.5 MB in the end (delta: -166.2 MB). Peak memory consumption was 165.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.2s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 881 SDslu, 3375 SDs, 0 SdLazy, 2199 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2760 GetRequests, 2167 SyntacticMatches, 3 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 836136 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3885 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 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 proved your program to be correct! Received shutdown request...