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/Problem14_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:36,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:36,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:36,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:36,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:36,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:36,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:36,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:36,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:36,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:36,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:36,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:36,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:36,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:36,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:36,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:36,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:36,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:36,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:36,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:36,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:36,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:36,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:36,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:36,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:36,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:36,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:36,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:36,974 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 [2019-10-14 22:02:36,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:36,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:37,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:37,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:37,002 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:37,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:37,003 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:37,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:37,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:37,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:37,004 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:37,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:37,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:37,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:37,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:37,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:37,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:37,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:37,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:37,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:37,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:37,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:37,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:37,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:37,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:37,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:37,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:37,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:37,309 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:37,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-10-14 22:02:37,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c08aee5f/3643279068fd4d7d8afb78cbbd4a8f5e/FLAG560d31bb1 [2019-10-14 22:02:37,995 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:37,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-10-14 22:02:38,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c08aee5f/3643279068fd4d7d8afb78cbbd4a8f5e/FLAG560d31bb1 [2019-10-14 22:02:38,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c08aee5f/3643279068fd4d7d8afb78cbbd4a8f5e [2019-10-14 22:02:38,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:38,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:38,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:38,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:38,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:38,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:38" (1/1) ... [2019-10-14 22:02:38,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:38, skipping insertion in model container [2019-10-14 22:02:38,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:38" (1/1) ... [2019-10-14 22:02:38,284 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:38,342 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:38,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:38,931 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:39,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:39,211 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:39,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39 WrapperNode [2019-10-14 22:02:39,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:39,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:39,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:39,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:39,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:39,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:39,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:39,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:39,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (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 [2019-10-14 22:02:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:40,930 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:40,930 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:40,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:40 BoogieIcfgContainer [2019-10-14 22:02:40,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:40,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:40,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:40,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:40,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:38" (1/3) ... [2019-10-14 22:02:40,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:40, skipping insertion in model container [2019-10-14 22:02:40,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39" (2/3) ... [2019-10-14 22:02:40,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:40, skipping insertion in model container [2019-10-14 22:02:40,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:40" (3/3) ... [2019-10-14 22:02:40,950 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label56.c [2019-10-14 22:02:40,960 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:40,972 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:40,983 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:41,018 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:41,018 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:41,019 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:41,019 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:41,019 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:41,019 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:41,019 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:41,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 22:02:41,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:41,064 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] [2019-10-14 22:02:41,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash -718662862, now seen corresponding path program 1 times [2019-10-14 22:02:41,077 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:41,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-14 22:02:41,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:41,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-14 22:02:41,393 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:41,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:41,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514474262] [2019-10-14 22:02:41,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:41,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:41,422 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:44,029 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:02:44,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:44,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-14 22:02:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:44,053 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:02:44,053 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:44,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:02:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:02:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:02:44,180 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 23 [2019-10-14 22:02:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:44,181 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:02:44,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:02:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 22:02:44,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:44,197 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:44,197 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1766651886, now seen corresponding path program 1 times [2019-10-14 22:02:44,199 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:44,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218578866] [2019-10-14 22:02:44,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:44,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218578866] [2019-10-14 22:02:44,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:44,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:44,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316234803] [2019-10-14 22:02:44,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:44,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:44,695 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:02:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:46,672 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:02:46,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:46,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2019-10-14 22:02:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:46,678 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:02:46,679 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:02:46,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:02:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:02:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:02:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:02:46,712 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 109 [2019-10-14 22:02:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:46,713 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:02:46,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:02:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 22:02:46,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:46,716 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:46,717 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1723912061, now seen corresponding path program 1 times [2019-10-14 22:02:46,717 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:46,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741278381] [2019-10-14 22:02:46,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:46,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741278381] [2019-10-14 22:02:46,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472010373] [2019-10-14 22:02:46,867 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 [2019-10-14 22:02:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:46,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:47,035 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:47,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:47,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165333380] [2019-10-14 22:02:47,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:47,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:47,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:47,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:47,048 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:02:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:47,932 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-14 22:02:47,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:47,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-14 22:02:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:47,941 INFO L225 Difference]: With dead ends: 1680 [2019-10-14 22:02:47,942 INFO L226 Difference]: Without dead ends: 1120 [2019-10-14 22:02:47,944 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-14 22:02:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-14 22:02:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 22:02:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-14 22:02:47,990 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 118 [2019-10-14 22:02:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:47,992 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-14 22:02:47,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-14 22:02:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-14 22:02:48,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:48,004 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:48,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:48,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1179660994, now seen corresponding path program 1 times [2019-10-14 22:02:48,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:48,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663094640] [2019-10-14 22:02:48,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:48,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663094640] [2019-10-14 22:02:48,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070353863] [2019-10-14 22:02:48,467 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 [2019-10-14 22:02:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:48,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:48,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:48,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:48,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496451941] [2019-10-14 22:02:48,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:48,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:48,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:48,640 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-14 22:02:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:49,542 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-14 22:02:49,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:49,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2019-10-14 22:02:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:49,552 INFO L225 Difference]: With dead ends: 2414 [2019-10-14 22:02:49,552 INFO L226 Difference]: Without dead ends: 1486 [2019-10-14 22:02:49,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-14 22:02:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-14 22:02:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-14 22:02:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-14 22:02:49,595 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 221 [2019-10-14 22:02:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:49,595 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-14 22:02:49,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-14 22:02:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-14 22:02:49,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:49,601 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:49,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:49,806 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash -718289567, now seen corresponding path program 1 times [2019-10-14 22:02:49,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:49,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769104731] [2019-10-14 22:02:49,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:50,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769104731] [2019-10-14 22:02:50,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663753071] [2019-10-14 22:02:50,193 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 [2019-10-14 22:02:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:50,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:50,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 22:02:50,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:50,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 22:02:50,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285252094] [2019-10-14 22:02:50,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:50,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:50,491 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 5 states. [2019-10-14 22:02:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:51,899 INFO L93 Difference]: Finished difference Result 3012 states and 4056 transitions. [2019-10-14 22:02:51,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:51,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-14 22:02:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:51,916 INFO L225 Difference]: With dead ends: 3012 [2019-10-14 22:02:51,916 INFO L226 Difference]: Without dead ends: 1714 [2019-10-14 22:02:51,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2019-10-14 22:02:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1696. [2019-10-14 22:02:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2019-10-14 22:02:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2179 transitions. [2019-10-14 22:02:52,012 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2179 transitions. Word has length 240 [2019-10-14 22:02:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:52,013 INFO L462 AbstractCegarLoop]: Abstraction has 1696 states and 2179 transitions. [2019-10-14 22:02:52,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2179 transitions. [2019-10-14 22:02:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-14 22:02:52,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:52,021 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:52,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,227 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash -528490103, now seen corresponding path program 1 times [2019-10-14 22:02:52,228 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:52,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11724891] [2019-10-14 22:02:52,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 58 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:53,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11724891] [2019-10-14 22:02:53,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008019056] [2019-10-14 22:02:53,480 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 [2019-10-14 22:02:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:53,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:53,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:53,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 251 proven. 53 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 22:02:53,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:53,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:53,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987360285] [2019-10-14 22:02:53,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:53,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:53,910 INFO L87 Difference]: Start difference. First operand 1696 states and 2179 transitions. Second operand 16 states. [2019-10-14 22:02:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:57,970 INFO L93 Difference]: Finished difference Result 3712 states and 4777 transitions. [2019-10-14 22:02:57,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:02:57,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 324 [2019-10-14 22:02:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:57,981 INFO L225 Difference]: With dead ends: 3712 [2019-10-14 22:02:57,981 INFO L226 Difference]: Without dead ends: 1975 [2019-10-14 22:02:57,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:02:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2019-10-14 22:02:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1890. [2019-10-14 22:02:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2019-10-14 22:02:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2225 transitions. [2019-10-14 22:02:58,047 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2225 transitions. Word has length 324 [2019-10-14 22:02:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:58,047 INFO L462 AbstractCegarLoop]: Abstraction has 1890 states and 2225 transitions. [2019-10-14 22:02:58,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2225 transitions. [2019-10-14 22:02:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-10-14 22:02:58,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:58,054 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:58,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:58,258 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash 288228474, now seen corresponding path program 1 times [2019-10-14 22:02:58,260 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:58,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515328333] [2019-10-14 22:02:58,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:58,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:58,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 119 proven. 245 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:02:59,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515328333] [2019-10-14 22:02:59,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210739433] [2019-10-14 22:02:59,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:59,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:59,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-10-14 22:02:59,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:59,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2019-10-14 22:02:59,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211339090] [2019-10-14 22:02:59,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:59,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:59,608 INFO L87 Difference]: Start difference. First operand 1890 states and 2225 transitions. Second operand 5 states. [2019-10-14 22:03:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:00,736 INFO L93 Difference]: Finished difference Result 4536 states and 5465 transitions. [2019-10-14 22:03:00,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:03:00,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2019-10-14 22:03:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:00,752 INFO L225 Difference]: With dead ends: 4536 [2019-10-14 22:03:00,752 INFO L226 Difference]: Without dead ends: 2652 [2019-10-14 22:03:00,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2019-10-14 22:03:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2019-10-14 22:03:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2466. [2019-10-14 22:03:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2466 states. [2019-10-14 22:03:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2938 transitions. [2019-10-14 22:03:00,819 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2938 transitions. Word has length 349 [2019-10-14 22:03:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:00,819 INFO L462 AbstractCegarLoop]: Abstraction has 2466 states and 2938 transitions. [2019-10-14 22:03:00,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2938 transitions. [2019-10-14 22:03:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2019-10-14 22:03:00,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:00,831 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:01,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:01,035 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1335459558, now seen corresponding path program 1 times [2019-10-14 22:03:01,036 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:01,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792715219] [2019-10-14 22:03:01,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 290 proven. 104 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-10-14 22:03:02,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792715219] [2019-10-14 22:03:02,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465932745] [2019-10-14 22:03:02,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:02,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 582 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-14 22:03:02,316 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:02,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:03:02,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107290390] [2019-10-14 22:03:02,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:03:02,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:03:02,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:03:02,319 INFO L87 Difference]: Start difference. First operand 2466 states and 2938 transitions. Second operand 9 states. [2019-10-14 22:03:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:04,385 INFO L93 Difference]: Finished difference Result 4760 states and 5717 transitions. [2019-10-14 22:03:04,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:03:04,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 459 [2019-10-14 22:03:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:04,398 INFO L225 Difference]: With dead ends: 4760 [2019-10-14 22:03:04,398 INFO L226 Difference]: Without dead ends: 2482 [2019-10-14 22:03:04,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2019-10-14 22:03:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2472. [2019-10-14 22:03:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2019-10-14 22:03:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 2841 transitions. [2019-10-14 22:03:04,471 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 2841 transitions. Word has length 459 [2019-10-14 22:03:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:04,472 INFO L462 AbstractCegarLoop]: Abstraction has 2472 states and 2841 transitions. [2019-10-14 22:03:04,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:03:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 2841 transitions. [2019-10-14 22:03:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2019-10-14 22:03:04,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:04,481 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:04,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:04,687 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1386217842, now seen corresponding path program 1 times [2019-10-14 22:03:04,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:04,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305260559] [2019-10-14 22:03:04,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:04,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:04,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 398 proven. 112 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2019-10-14 22:03:06,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305260559] [2019-10-14 22:03:06,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319623674] [2019-10-14 22:03:06,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:03:06,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:06,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 769 proven. 2 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 22:03:06,920 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:06,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:03:06,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443470940] [2019-10-14 22:03:06,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:03:06,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:03:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:03:06,926 INFO L87 Difference]: Start difference. First operand 2472 states and 2841 transitions. Second operand 12 states. [2019-10-14 22:03:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:09,086 INFO L93 Difference]: Finished difference Result 5042 states and 5813 transitions. [2019-10-14 22:03:09,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:03:09,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 543 [2019-10-14 22:03:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:09,098 INFO L225 Difference]: With dead ends: 5042 [2019-10-14 22:03:09,098 INFO L226 Difference]: Without dead ends: 2717 [2019-10-14 22:03:09,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:03:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2019-10-14 22:03:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2464. [2019-10-14 22:03:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-10-14 22:03:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2740 transitions. [2019-10-14 22:03:09,158 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2740 transitions. Word has length 543 [2019-10-14 22:03:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:09,159 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 2740 transitions. [2019-10-14 22:03:09,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:03:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2740 transitions. [2019-10-14 22:03:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2019-10-14 22:03:09,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:09,166 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:09,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:09,373 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1445260346, now seen corresponding path program 2 times [2019-10-14 22:03:09,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:09,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230554583] [2019-10-14 22:03:09,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:09,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:09,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 621 proven. 224 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-10-14 22:03:10,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230554583] [2019-10-14 22:03:10,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558210861] [2019-10-14 22:03:10,417 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:10,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:03:10,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:03:10,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:10,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:10,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:03:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 816 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-10-14 22:03:10,861 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:10,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:03:10,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765703010] [2019-10-14 22:03:10,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:03:10,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:03:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:03:10,864 INFO L87 Difference]: Start difference. First operand 2464 states and 2740 transitions. Second operand 17 states.