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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:37,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:37,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:37,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:37,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:37,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:37,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:37,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:37,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:37,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:37,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:37,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:37,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:37,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:37,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:37,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:37,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:37,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:37,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:37,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:37,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:37,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:37,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:37,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:37,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:37,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:37,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:37,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:37,687 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 22:02:37,721 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:37,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:37,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:37,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:37,723 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:37,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:37,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:37,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:37,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:37,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:37,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:37,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:37,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:37,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:37,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:37,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:37,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:37,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:37,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:37,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:37,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:37,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:37,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:37,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:37,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:37,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:37,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:37,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:37,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:38,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:38,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:38,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:38,057 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:38,058 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:38,058 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-14 22:02:38,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e604d19e/4a6a75ec67d04c0c8d297a165669ca82/FLAG8f3436893 [2019-10-14 22:02:38,733 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:38,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-14 22:02:38,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e604d19e/4a6a75ec67d04c0c8d297a165669ca82/FLAG8f3436893 [2019-10-14 22:02:39,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e604d19e/4a6a75ec67d04c0c8d297a165669ca82 [2019-10-14 22:02:39,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:39,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:39,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:39,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:39,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:39,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c49610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39, skipping insertion in model container [2019-10-14 22:02:39,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:39" (1/1) ... [2019-10-14 22:02:39,032 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:39,090 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:39,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:39,646 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:39,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:39,864 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:39,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:39 WrapperNode [2019-10-14 22:02:39,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:39,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:39,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:39,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:39,887 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 22:02:39,888 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 22:02:39,931 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 22:02:39,931 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 22:02:40,019 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 22:02:40,046 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 22:02:40,066 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 22:02:40,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:40,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:40,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:40,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:40,091 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 22:02:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:40,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:40,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:41,776 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:41,777 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:41,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:41 BoogieIcfgContainer [2019-10-14 22:02:41,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:41,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:41,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:41,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:41,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:39" (1/3) ... [2019-10-14 22:02:41,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a67eaea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:41, skipping insertion in model container [2019-10-14 22:02:41,784 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 22:02:41,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a67eaea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:41, skipping insertion in model container [2019-10-14 22:02:41,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:41" (3/3) ... [2019-10-14 22:02:41,787 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label57.c [2019-10-14 22:02:41,797 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:41,806 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:41,817 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:41,859 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:41,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:41,859 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:41,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:41,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:41,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:41,860 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:41,860 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 22:02:41,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:41,892 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] [2019-10-14 22:02:41,894 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1500027043, now seen corresponding path program 1 times [2019-10-14 22:02:41,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:41,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194525450] [2019-10-14 22:02:41,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,227 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 22:02:42,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194525450] [2019-10-14 22:02:42,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:42,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:42,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335552701] [2019-10-14 22:02:42,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:42,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:42,258 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:44,797 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:02:44,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:44,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 22:02:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:44,820 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:02:44,820 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:44,830 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 22:02:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:02:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:02:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:02:44,959 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 36 [2019-10-14 22:02:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:44,959 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:02:44,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:02:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 22:02:44,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:44,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:44,967 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1488834266, now seen corresponding path program 1 times [2019-10-14 22:02:44,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:44,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149758253] [2019-10-14 22:02:44,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:45,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149758253] [2019-10-14 22:02:45,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:45,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:45,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498077747] [2019-10-14 22:02:45,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:45,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:45,386 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:02:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:47,313 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:02:47,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:47,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-10-14 22:02:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:47,320 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:02:47,320 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:02:47,322 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 22:02:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:02:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:02:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:02:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:02:47,356 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 122 [2019-10-14 22:02:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:47,357 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:02:47,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:47,357 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:02:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 22:02:47,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:47,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:47,363 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash -753448615, now seen corresponding path program 1 times [2019-10-14 22:02:47,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:47,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198352864] [2019-10-14 22:02:47,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:47,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:47,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:47,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198352864] [2019-10-14 22:02:47,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344318442] [2019-10-14 22:02:47,566 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 22:02:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:47,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:47,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:47,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:47,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863648441] [2019-10-14 22:02:47,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:47,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:47,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:47,731 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:02:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:48,661 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-14 22:02:48,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:48,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-10-14 22:02:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:48,670 INFO L225 Difference]: With dead ends: 1680 [2019-10-14 22:02:48,670 INFO L226 Difference]: Without dead ends: 1120 [2019-10-14 22:02:48,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 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 22:02:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-14 22:02:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-14 22:02:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 22:02:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-14 22:02:48,710 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 131 [2019-10-14 22:02:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:48,711 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-14 22:02:48,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-14 22:02:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 22:02:48,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:48,717 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:02:48,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:48,925 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 89446293, now seen corresponding path program 1 times [2019-10-14 22:02:48,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:48,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24521027] [2019-10-14 22:02:48,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:49,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24521027] [2019-10-14 22:02:49,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771029484] [2019-10-14 22:02:49,253 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 22:02:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:49,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:49,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:49,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:49,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35401446] [2019-10-14 22:02:49,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:49,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:49,466 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-14 22:02:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:50,373 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-14 22:02:50,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:50,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-14 22:02:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:50,389 INFO L225 Difference]: With dead ends: 2414 [2019-10-14 22:02:50,389 INFO L226 Difference]: Without dead ends: 1486 [2019-10-14 22:02:50,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 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 22:02:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-14 22:02:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-14 22:02:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-14 22:02:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-14 22:02:50,467 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 234 [2019-10-14 22:02:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:50,469 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-14 22:02:50,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-14 22:02:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-14 22:02:50,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:50,477 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:02:50,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:50,683 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -5420906, now seen corresponding path program 1 times [2019-10-14 22:02:50,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:50,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721976589] [2019-10-14 22:02:50,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:50,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:50,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-14 22:02:51,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721976589] [2019-10-14 22:02:51,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668473054] [2019-10-14 22:02:51,074 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 22:02:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:51,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 22:02:51,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:51,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 22:02:51,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559463109] [2019-10-14 22:02:51,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:51,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:51,316 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-14 22:02:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:52,267 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-14 22:02:52,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:52,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2019-10-14 22:02:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:52,282 INFO L225 Difference]: With dead ends: 3156 [2019-10-14 22:02:52,282 INFO L226 Difference]: Without dead ends: 1858 [2019-10-14 22:02:52,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-14 22:02:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-14 22:02:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-14 22:02:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-14 22:02:52,345 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 253 [2019-10-14 22:02:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:52,346 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-14 22:02:52,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-14 22:02:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-14 22:02:52,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:52,353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:52,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,562 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:52,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1175360854, now seen corresponding path program 1 times [2019-10-14 22:02:52,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:52,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086676197] [2019-10-14 22:02:52,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:52,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086676197] [2019-10-14 22:02:52,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63833403] [2019-10-14 22:02:52,901 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 22:02:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:53,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:53,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:53,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 22:02:53,416 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:53,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-10-14 22:02:53,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305549942] [2019-10-14 22:02:53,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:53,419 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:53,421 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-14 22:02:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:54,937 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-14 22:02:54,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:54,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-14 22:02:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:54,955 INFO L225 Difference]: With dead ends: 3930 [2019-10-14 22:02:54,955 INFO L226 Difference]: Without dead ends: 2262 [2019-10-14 22:02:54,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-14 22:02:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-14 22:02:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-14 22:02:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-14 22:02:55,029 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 259 [2019-10-14 22:02:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:55,029 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-14 22:02:55,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-14 22:02:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-14 22:02:55,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:55,037 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:55,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:55,247 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -518867421, now seen corresponding path program 1 times [2019-10-14 22:02:55,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:55,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296476056] [2019-10-14 22:02:55,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:55,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:55,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 97 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:56,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296476056] [2019-10-14 22:02:56,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348005152] [2019-10-14 22:02:56,306 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 22:02:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:56,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:56,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:56,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 283 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 22:02:56,736 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:56,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:56,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748209005] [2019-10-14 22:02:56,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:56,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:56,738 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-14 22:03:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:00,614 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-14 22:03:00,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:03:00,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 343 [2019-10-14 22:03:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:00,627 INFO L225 Difference]: With dead ends: 4460 [2019-10-14 22:03:00,627 INFO L226 Difference]: Without dead ends: 2349 [2019-10-14 22:03:00,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:03:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-14 22:03:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-14 22:03:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-14 22:03:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-14 22:03:00,698 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 343 [2019-10-14 22:03:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:00,699 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-14 22:03:00,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:03:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-14 22:03:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-14 22:03:00,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:00,708 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:00,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:00,917 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1390438032, now seen corresponding path program 1 times [2019-10-14 22:03:00,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:00,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977383419] [2019-10-14 22:03:00,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:00,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:00,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 165 proven. 146 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:03:01,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977383419] [2019-10-14 22:03:01,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293685586] [2019-10-14 22:03:01,818 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 22:03:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:03:01,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:02,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 22:03:02,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:02,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 22:03:02,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244487795] [2019-10-14 22:03:02,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:02,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:03:02,129 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-14 22:03:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:03,224 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-14 22:03:03,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:03:03,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2019-10-14 22:03:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:03,237 INFO L225 Difference]: With dead ends: 5098 [2019-10-14 22:03:03,237 INFO L226 Difference]: Without dead ends: 2836 [2019-10-14 22:03:03,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:03:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-14 22:03:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-14 22:03:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-14 22:03:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-14 22:03:03,310 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 368 [2019-10-14 22:03:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:03,310 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-14 22:03:03,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-14 22:03:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2019-10-14 22:03:03,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:03,324 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:03,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:03,528 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1446760509, now seen corresponding path program 1 times [2019-10-14 22:03:03,528 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:03,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732447419] [2019-10-14 22:03:03,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:03,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:03,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:03:04,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732447419] [2019-10-14 22:03:04,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586132412] [2019-10-14 22:03:04,428 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 22:03:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:04,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 22:03:04,938 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:04,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:03:04,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814388138] [2019-10-14 22:03:04,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:03:04,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:03:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:03:04,942 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-14 22:03:06,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:06,982 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-14 22:03:06,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:03:06,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 478 [2019-10-14 22:03:06,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:06,995 INFO L225 Difference]: With dead ends: 5490 [2019-10-14 22:03:06,995 INFO L226 Difference]: Without dead ends: 2846 [2019-10-14 22:03:07,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 491 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 22:03:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-14 22:03:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-14 22:03:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-14 22:03:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-14 22:03:07,069 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 478 [2019-10-14 22:03:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:07,070 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-14 22:03:07,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:03:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-14 22:03:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-10-14 22:03:07,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:07,078 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:07,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:07,283 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 171945148, now seen corresponding path program 1 times [2019-10-14 22:03:07,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:07,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864914366] [2019-10-14 22:03:07,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 463 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-14 22:03:08,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864914366] [2019-10-14 22:03:08,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120227428] [2019-10-14 22:03:08,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:03:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:03:09,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:09,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 836 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-14 22:03:09,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:09,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:03:09,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781706270] [2019-10-14 22:03:09,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:03:09,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:03:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:03:09,500 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-14 22:03:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:11,571 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-14 22:03:11,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:03:11,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 562 [2019-10-14 22:03:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:11,585 INFO L225 Difference]: With dead ends: 5780 [2019-10-14 22:03:11,585 INFO L226 Difference]: Without dead ends: 3085 [2019-10-14 22:03:11,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:03:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-14 22:03:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-14 22:03:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-14 22:03:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-14 22:03:11,653 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 562 [2019-10-14 22:03:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:11,654 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-14 22:03:11,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:03:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-14 22:03:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2019-10-14 22:03:11,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:11,662 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:11,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:11,867 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:11,868 INFO L82 PathProgramCache]: Analyzing trace with hash 726916816, now seen corresponding path program 2 times [2019-10-14 22:03:11,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:11,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56420210] [2019-10-14 22:03:11,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:11,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:11,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 686 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-14 22:03:12,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56420210] [2019-10-14 22:03:12,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294634590] [2019-10-14 22:03:12,838 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:12,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:03:12,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:03:13,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:13,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:13,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:03:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 888 proven. 2 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2019-10-14 22:03:13,488 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:13,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:03:13,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633908521] [2019-10-14 22:03:13,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:03:13,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:03:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:03:13,492 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.