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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:17:23,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:23,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:23,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:23,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:23,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:23,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:23,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:23,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:23,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:23,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:23,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:23,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:23,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:23,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:23,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:23,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:23,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:23,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:23,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:23,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:23,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:23,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:23,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:23,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:17:23,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:17:23,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:17:23,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:17:23,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:17:23,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:17:23,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:23,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:23,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:23,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:23,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:23,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:23,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:23,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:23,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:23,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:23,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:24,000 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 [2019-10-13 19:17:24,015 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:24,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:24,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:24,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:24,017 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:24,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:24,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:24,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:24,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:24,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:24,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:24,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:24,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:24,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:24,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:24,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:24,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:24,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:24,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:24,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:24,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:24,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:24,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:24,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:24,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:24,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:24,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:24,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:24,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:24,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:24,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:24,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:24,323 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:24,324 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:24,324 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-10-13 19:17:24,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1503c6c67/d842088a7e5d43a6ba226fc45366afa3/FLAG18c006da7 [2019-10-13 19:17:24,879 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:24,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-10-13 19:17:24,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1503c6c67/d842088a7e5d43a6ba226fc45366afa3/FLAG18c006da7 [2019-10-13 19:17:25,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1503c6c67/d842088a7e5d43a6ba226fc45366afa3 [2019-10-13 19:17:25,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:25,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:25,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:25,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:25,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:25,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73961d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25, skipping insertion in model container [2019-10-13 19:17:25,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,289 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:25,307 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:25,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:25,499 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:25,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:25,530 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:25,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25 WrapperNode [2019-10-13 19:17:25,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:25,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:25,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:25,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:25,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:25,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:25,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:25,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:25,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (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 [2019-10-13 19:17:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-13 19:17:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:17:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:17:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:17:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:17:26,020 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:26,021 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:17:26,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:26 BoogieIcfgContainer [2019-10-13 19:17:26,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:26,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:26,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:26,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:26,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:25" (1/3) ... [2019-10-13 19:17:26,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0741d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:26, skipping insertion in model container [2019-10-13 19:17:26,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (2/3) ... [2019-10-13 19:17:26,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0741d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:26, skipping insertion in model container [2019-10-13 19:17:26,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:26" (3/3) ... [2019-10-13 19:17:26,045 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-10-13 19:17:26,054 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:26,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:26,071 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:26,096 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:26,096 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:26,096 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:26,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:26,097 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:26,097 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:26,097 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:26,097 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-13 19:17:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:17:26,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:26,121 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:26,122 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 868129876, now seen corresponding path program 1 times [2019-10-13 19:17:26,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:26,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269543586] [2019-10-13 19:17:26,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:26,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269543586] [2019-10-13 19:17:26,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:26,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:17:26,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463895128] [2019-10-13 19:17:26,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:17:26,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:26,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:17:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:17:26,435 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-13 19:17:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:26,556 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-10-13 19:17:26,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:17:26,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 19:17:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:26,569 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:17:26,570 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:17:26,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:17:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:17:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:17:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:17:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-13 19:17:26,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-10-13 19:17:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:26,639 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-13 19:17:26,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:17:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-13 19:17:26,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:17:26,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:26,642 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:26,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash -202652409, now seen corresponding path program 1 times [2019-10-13 19:17:26,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:26,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28596429] [2019-10-13 19:17:26,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:26,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28596429] [2019-10-13 19:17:26,925 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:26,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:17:26,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741755558] [2019-10-13 19:17:26,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:17:26,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:17:26,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:17:26,930 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2019-10-13 19:17:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:27,158 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-13 19:17:27,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:17:27,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 19:17:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:27,161 INFO L225 Difference]: With dead ends: 30 [2019-10-13 19:17:27,161 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:17:27,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:17:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:17:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:17:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-13 19:17:27,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2019-10-13 19:17:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:27,177 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-13 19:17:27,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:17:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-13 19:17:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:17:27,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:27,180 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:27,182 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1540157926, now seen corresponding path program 1 times [2019-10-13 19:17:27,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:27,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021248340] [2019-10-13 19:17:27,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021248340] [2019-10-13 19:17:27,487 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:27,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:17:27,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662097393] [2019-10-13 19:17:27,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:17:27,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:17:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:17:27,489 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-10-13 19:17:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:27,684 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-10-13 19:17:27,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:17:27,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 19:17:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:27,686 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:17:27,686 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:17:27,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:17:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 19:17:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:17:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 19:17:27,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2019-10-13 19:17:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:27,701 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 19:17:27,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:17:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 19:17:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:17:27,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:27,704 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:27,704 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1697189824, now seen corresponding path program 1 times [2019-10-13 19:17:27,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:27,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100838104] [2019-10-13 19:17:27,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100838104] [2019-10-13 19:17:27,891 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:27,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:17:27,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143723725] [2019-10-13 19:17:27,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:17:27,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:17:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:17:27,893 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-13 19:17:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,056 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-13 19:17:28,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:17:28,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-13 19:17:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,057 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:17:28,058 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:17:28,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:17:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:17:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 19:17:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:17:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 19:17:28,065 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2019-10-13 19:17:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,065 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 19:17:28,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:17:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 19:17:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:28,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,067 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,067 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -255201960, now seen corresponding path program 1 times [2019-10-13 19:17:28,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091925029] [2019-10-13 19:17:28,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:28,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091925029] [2019-10-13 19:17:28,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690076130] [2019-10-13 19:17:28,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:17:28,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:28,385 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:28,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 19:17:28,386 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059984398] [2019-10-13 19:17:28,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:17:28,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:17:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:17:28,389 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2019-10-13 19:17:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,587 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-13 19:17:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:17:28,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-10-13 19:17:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,591 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:17:28,591 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 19:17:28,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 19:17:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-10-13 19:17:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:17:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-13 19:17:28,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2019-10-13 19:17:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,608 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-13 19:17:28,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:17:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-13 19:17:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:28,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,611 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,816 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2963478, now seen corresponding path program 1 times [2019-10-13 19:17:28,817 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406828995] [2019-10-13 19:17:28,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:29,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406828995] [2019-10-13 19:17:29,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981872876] [2019-10-13 19:17:29,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:29,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:17:29,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:29,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:29,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2019-10-13 19:17:29,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68286019] [2019-10-13 19:17:29,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:17:29,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:17:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:17:29,568 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 16 states. [2019-10-13 19:17:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:30,539 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-10-13 19:17:30,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:17:30,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-10-13 19:17:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:30,542 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:17:30,542 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:17:30,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:17:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-10-13 19:17:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:17:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-13 19:17:30,550 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-10-13 19:17:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:30,550 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-13 19:17:30,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:17:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-13 19:17:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:30,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:30,552 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:30,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,756 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -390063532, now seen corresponding path program 1 times [2019-10-13 19:17:30,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:30,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643221780] [2019-10-13 19:17:30,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,014 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 27 [2019-10-13 19:17:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:31,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643221780] [2019-10-13 19:17:31,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762253037] [2019-10-13 19:17:31,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:17:31,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:31,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:39,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2019-10-13 19:17:39,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:40,011 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:17:40,012 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-10-13 19:17:40,013 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:40,094 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-10-13 19:17:40,094 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-13 19:17:40,094 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-13 19:17:40,095 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-13 19:17:40,095 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:17:40,096 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-10-13 19:17:40,403 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-10-13 19:17:41,808 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 45 [2019-10-13 19:17:43,619 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-10-13 19:17:44,255 WARN L191 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-10-13 19:17:44,579 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2019-10-13 19:17:44,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,934 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-10-13 19:17:45,556 WARN L191 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-10-13 19:17:45,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:45,866 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-10-13 19:17:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:45,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:45,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2019-10-13 19:17:45,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102340793] [2019-10-13 19:17:45,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 19:17:45,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 19:17:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=607, Unknown=4, NotChecked=0, Total=702 [2019-10-13 19:17:45,999 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 27 states. [2019-10-13 19:17:47,288 WARN L191 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-10-13 19:17:47,633 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-13 19:17:48,018 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-10-13 19:17:51,582 WARN L191 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-13 19:17:51,759 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-13 19:17:52,177 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-10-13 19:17:54,554 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2019-10-13 19:17:55,509 WARN L191 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-10-13 19:17:56,438 WARN L191 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2019-10-13 19:18:00,263 WARN L191 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-10-13 19:18:00,480 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-10-13 19:18:01,763 WARN L191 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-10-13 19:18:02,972 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-10-13 19:18:03,856 WARN L191 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-10-13 19:18:05,228 WARN L191 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-10-13 19:18:06,499 WARN L191 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2019-10-13 19:18:06,725 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-10-13 19:18:07,072 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-10-13 19:18:07,447 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2019-10-13 19:18:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:07,647 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 19:18:07,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:18:07,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2019-10-13 19:18:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:07,650 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:18:07,650 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:18:07,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=381, Invalid=1871, Unknown=4, NotChecked=0, Total=2256 [2019-10-13 19:18:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:18:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2019-10-13 19:18:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:18:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-13 19:18:07,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 28 [2019-10-13 19:18:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:07,659 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-13 19:18:07,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 19:18:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-13 19:18:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:18:07,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:07,661 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:07,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:07,865 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:07,866 INFO L82 PathProgramCache]: Analyzing trace with hash -330785168, now seen corresponding path program 2 times [2019-10-13 19:18:07,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:07,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638361029] [2019-10-13 19:18:07,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:07,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:07,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:07,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638361029] [2019-10-13 19:18:07,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131439252] [2019-10-13 19:18:07,982 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-13 19:18:08,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 19:18:08,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:08,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:18:08,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:18:08,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:08,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-10-13 19:18:08,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014029211] [2019-10-13 19:18:08,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:18:08,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:18:08,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:18:08,177 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 13 states. [2019-10-13 19:18:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:09,254 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-10-13 19:18:09,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 19:18:09,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-13 19:18:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:09,256 INFO L225 Difference]: With dead ends: 64 [2019-10-13 19:18:09,256 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:18:09,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:18:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:18:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2019-10-13 19:18:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:18:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-13 19:18:09,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2019-10-13 19:18:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:09,265 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-13 19:18:09,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:18:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-13 19:18:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:18:09,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:09,266 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:09,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:09,475 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -465646740, now seen corresponding path program 2 times [2019-10-13 19:18:09,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:09,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571138475] [2019-10-13 19:18:09,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:09,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:09,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:09,833 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 30 [2019-10-13 19:18:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:10,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571138475] [2019-10-13 19:18:10,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642825249] [2019-10-13 19:18:10,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:10,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:10,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:10,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-13 19:18:10,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:10,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms