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/eca-rers2012/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:25,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:25,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:25,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:25,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:25,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:25,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:25,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:25,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:25,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:25,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:25,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:25,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:25,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:25,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:25,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:25,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:25,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:25,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:25,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:25,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:25,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:25,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:25,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:25,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:55:25,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:55:25,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:55:25,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:55:25,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:55:25,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:55:25,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:25,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:25,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:25,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:25,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:25,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:25,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:25,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:25,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:25,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:25,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:25,737 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 17:55:25,767 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:25,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:25,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:25,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:25,770 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:25,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:25,771 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:25,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:25,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:25,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:25,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:25,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:25,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:25,773 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:25,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:25,774 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:25,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:25,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:25,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:25,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:25,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:25,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:25,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:25,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:25,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:25,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:25,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:25,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:25,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:26,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:26,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:26,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:26,111 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:26,111 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:26,112 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-13 17:55:26,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bcd3f40/1e48817b43c7414da983486b69995234/FLAGc764e366c [2019-10-13 17:55:26,782 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:26,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-13 17:55:26,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bcd3f40/1e48817b43c7414da983486b69995234/FLAGc764e366c [2019-10-13 17:55:26,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bcd3f40/1e48817b43c7414da983486b69995234 [2019-10-13 17:55:26,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:26,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:26,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:26,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:26,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:26,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26, skipping insertion in model container [2019-10-13 17:55:26,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,971 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:27,050 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:28,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:28,025 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:28,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:28,327 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:28,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28 WrapperNode [2019-10-13 17:55:28,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:28,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:28,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:28,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:28,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (1/1) ... [2019-10-13 17:55:28,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:28,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:28,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:28,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:28,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (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 17:55:28,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:28,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:28,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:30,840 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:30,840 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:30,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:30 BoogieIcfgContainer [2019-10-13 17:55:30,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:30,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:30,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:30,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:30,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:26" (1/3) ... [2019-10-13 17:55:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb79bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:30, skipping insertion in model container [2019-10-13 17:55:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:28" (2/3) ... [2019-10-13 17:55:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb79bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:30, skipping insertion in model container [2019-10-13 17:55:30,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:30" (3/3) ... [2019-10-13 17:55:30,851 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-10-13 17:55:30,862 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:30,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:30,883 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:30,912 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:30,913 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:30,913 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:30,913 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:30,913 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:30,913 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:30,913 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:30,914 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 17:55:30,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:30,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:30,958 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash -181884296, now seen corresponding path program 1 times [2019-10-13 17:55:30,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:30,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114739786] [2019-10-13 17:55:30,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:30,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:30,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:31,886 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:32,071 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 17:55:32,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114739786] [2019-10-13 17:55:32,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:32,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:32,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123800000] [2019-10-13 17:55:32,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:32,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:32,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:32,104 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:32,315 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:32,650 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-13 17:55:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:36,276 INFO L93 Difference]: Finished difference Result 1093 states and 1965 transitions. [2019-10-13 17:55:36,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:36,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-13 17:55:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:36,311 INFO L225 Difference]: With dead ends: 1093 [2019-10-13 17:55:36,311 INFO L226 Difference]: Without dead ends: 700 [2019-10-13 17:55:36,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-13 17:55:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 465. [2019-10-13 17:55:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-13 17:55:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 759 transitions. [2019-10-13 17:55:36,443 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 759 transitions. Word has length 157 [2019-10-13 17:55:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:36,444 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 759 transitions. [2019-10-13 17:55:36,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 759 transitions. [2019-10-13 17:55:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 17:55:36,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:36,451 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:36,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:36,451 INFO L82 PathProgramCache]: Analyzing trace with hash 752192065, now seen corresponding path program 1 times [2019-10-13 17:55:36,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:36,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150556248] [2019-10-13 17:55:36,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:36,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:36,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,695 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:36,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150556248] [2019-10-13 17:55:36,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:36,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:36,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298317094] [2019-10-13 17:55:36,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:36,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:36,919 INFO L87 Difference]: Start difference. First operand 465 states and 759 transitions. Second operand 8 states. [2019-10-13 17:55:37,064 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:37,377 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:37,721 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:41,507 INFO L93 Difference]: Finished difference Result 1808 states and 3026 transitions. [2019-10-13 17:55:41,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:55:41,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2019-10-13 17:55:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:41,517 INFO L225 Difference]: With dead ends: 1808 [2019-10-13 17:55:41,517 INFO L226 Difference]: Without dead ends: 1349 [2019-10-13 17:55:41,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:55:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-10-13 17:55:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 905. [2019-10-13 17:55:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-13 17:55:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1402 transitions. [2019-10-13 17:55:41,622 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1402 transitions. Word has length 167 [2019-10-13 17:55:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:41,626 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1402 transitions. [2019-10-13 17:55:41,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1402 transitions. [2019-10-13 17:55:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 17:55:41,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:41,632 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:41,633 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 519491724, now seen corresponding path program 1 times [2019-10-13 17:55:41,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:41,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113758536] [2019-10-13 17:55:41,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:41,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:41,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,951 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:42,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113758536] [2019-10-13 17:55:42,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088945058] [2019-10-13 17:55:42,103 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 17:55:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:42,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:42,530 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:42,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 17:55:42,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057274733] [2019-10-13 17:55:42,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:42,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:42,536 INFO L87 Difference]: Start difference. First operand 905 states and 1402 transitions. Second operand 3 states. [2019-10-13 17:55:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:43,709 INFO L93 Difference]: Finished difference Result 2650 states and 4183 transitions. [2019-10-13 17:55:43,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:43,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-10-13 17:55:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:43,721 INFO L225 Difference]: With dead ends: 2650 [2019-10-13 17:55:43,721 INFO L226 Difference]: Without dead ends: 1751 [2019-10-13 17:55:43,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2019-10-13 17:55:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1537. [2019-10-13 17:55:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2019-10-13 17:55:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2157 transitions. [2019-10-13 17:55:43,788 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2157 transitions. Word has length 169 [2019-10-13 17:55:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:43,789 INFO L462 AbstractCegarLoop]: Abstraction has 1537 states and 2157 transitions. [2019-10-13 17:55:43,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2157 transitions. [2019-10-13 17:55:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 17:55:43,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:43,798 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:44,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:44,012 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1544066575, now seen corresponding path program 1 times [2019-10-13 17:55:44,014 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:44,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412847449] [2019-10-13 17:55:44,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,342 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:44,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412847449] [2019-10-13 17:55:44,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:44,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:55:44,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230465377] [2019-10-13 17:55:44,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:55:44,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:55:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:44,681 INFO L87 Difference]: Start difference. First operand 1537 states and 2157 transitions. Second operand 9 states. [2019-10-13 17:55:44,815 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:45,348 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:48,122 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:49,236 INFO L93 Difference]: Finished difference Result 6180 states and 9213 transitions. [2019-10-13 17:55:49,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:55:49,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 218 [2019-10-13 17:55:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:49,268 INFO L225 Difference]: With dead ends: 6180 [2019-10-13 17:55:49,268 INFO L226 Difference]: Without dead ends: 4649 [2019-10-13 17:55:49,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:55:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2019-10-13 17:55:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4164. [2019-10-13 17:55:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4164 states. [2019-10-13 17:55:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5670 transitions. [2019-10-13 17:55:49,482 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5670 transitions. Word has length 218 [2019-10-13 17:55:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:49,483 INFO L462 AbstractCegarLoop]: Abstraction has 4164 states and 5670 transitions. [2019-10-13 17:55:49,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:55:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5670 transitions. [2019-10-13 17:55:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-13 17:55:49,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:49,499 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:49,499 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 661081392, now seen corresponding path program 1 times [2019-10-13 17:55:49,500 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:49,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602359559] [2019-10-13 17:55:49,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:49,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:49,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:55:50,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602359559] [2019-10-13 17:55:50,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672692938] [2019-10-13 17:55:50,031 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 17:55:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:55:50,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 17:55:50,510 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:50,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 17:55:50,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087650545] [2019-10-13 17:55:50,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:50,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:50,513 INFO L87 Difference]: Start difference. First operand 4164 states and 5670 transitions. Second operand 5 states. [2019-10-13 17:55:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:52,101 INFO L93 Difference]: Finished difference Result 12541 states and 18043 transitions. [2019-10-13 17:55:52,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:52,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2019-10-13 17:55:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:52,158 INFO L225 Difference]: With dead ends: 12541 [2019-10-13 17:55:52,159 INFO L226 Difference]: Without dead ends: 8383 [2019-10-13 17:55:52,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:55:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8383 states. [2019-10-13 17:55:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8383 to 8069. [2019-10-13 17:55:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8069 states. [2019-10-13 17:55:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 10860 transitions. [2019-10-13 17:55:52,436 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 10860 transitions. Word has length 253 [2019-10-13 17:55:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:52,440 INFO L462 AbstractCegarLoop]: Abstraction has 8069 states and 10860 transitions. [2019-10-13 17:55:52,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 10860 transitions. [2019-10-13 17:55:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-13 17:55:52,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:52,471 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:52,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:52,677 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1003600938, now seen corresponding path program 1 times [2019-10-13 17:55:52,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:52,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823675339] [2019-10-13 17:55:52,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:53,039 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:53,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823675339] [2019-10-13 17:55:53,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685195580] [2019-10-13 17:55:53,535 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 17:55:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:53,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:53,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:53,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:53,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 17:55:53,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999331721] [2019-10-13 17:55:53,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:53,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:53,818 INFO L87 Difference]: Start difference. First operand 8069 states and 10860 transitions. Second operand 3 states. [2019-10-13 17:55:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:54,968 INFO L93 Difference]: Finished difference Result 19949 states and 27733 transitions. [2019-10-13 17:55:54,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:54,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2019-10-13 17:55:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:55,042 INFO L225 Difference]: With dead ends: 19949 [2019-10-13 17:55:55,042 INFO L226 Difference]: Without dead ends: 11886 [2019-10-13 17:55:55,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2019-10-13 17:55:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11883. [2019-10-13 17:55:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11883 states. [2019-10-13 17:55:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11883 states to 11883 states and 16353 transitions. [2019-10-13 17:55:55,564 INFO L78 Accepts]: Start accepts. Automaton has 11883 states and 16353 transitions. Word has length 257 [2019-10-13 17:55:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:55,564 INFO L462 AbstractCegarLoop]: Abstraction has 11883 states and 16353 transitions. [2019-10-13 17:55:55,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11883 states and 16353 transitions. [2019-10-13 17:55:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-10-13 17:55:55,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:55,614 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:55,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:55,829 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2045887005, now seen corresponding path program 1 times [2019-10-13 17:55:55,830 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:55,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957023457] [2019-10-13 17:55:55,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:55,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:55,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,096 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:56,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957023457] [2019-10-13 17:55:56,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460729671] [2019-10-13 17:55:56,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:56,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:56,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 17:55:56,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:56,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:55:56,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976959739] [2019-10-13 17:55:56,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:56,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:56,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:56,776 INFO L87 Difference]: Start difference. First operand 11883 states and 16353 transitions. Second operand 3 states. [2019-10-13 17:55:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:58,190 INFO L93 Difference]: Finished difference Result 34707 states and 48209 transitions. [2019-10-13 17:55:58,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:55:58,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2019-10-13 17:55:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:58,299 INFO L225 Difference]: With dead ends: 34707 [2019-10-13 17:55:58,300 INFO L226 Difference]: Without dead ends: 22830 [2019-10-13 17:55:58,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22830 states. [2019-10-13 17:55:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22830 to 22590. [2019-10-13 17:55:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22590 states. [2019-10-13 17:55:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22590 states to 22590 states and 31099 transitions. [2019-10-13 17:55:58,982 INFO L78 Accepts]: Start accepts. Automaton has 22590 states and 31099 transitions. Word has length 299 [2019-10-13 17:55:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:58,982 INFO L462 AbstractCegarLoop]: Abstraction has 22590 states and 31099 transitions. [2019-10-13 17:55:58,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:55:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22590 states and 31099 transitions. [2019-10-13 17:55:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-13 17:55:59,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:59,066 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:59,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:59,271 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash -58068566, now seen corresponding path program 1 times [2019-10-13 17:55:59,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:59,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557397966] [2019-10-13 17:55:59,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:59,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:59,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY