/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:18,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:18,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:18,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:18,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:18,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:18,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:18,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:18,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:18,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:18,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:18,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:18,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:18,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:18,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:18,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:18,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:18,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:18,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:18,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:18,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:18,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:18,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:18,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:18,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:18,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:18,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:18,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:18,841 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 [2019-11-06 19:18:18,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:18,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:18,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:18,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:18,863 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:18,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:18,864 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:18,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:18,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:18,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:18,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:18,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:18,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:18,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:18,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:18,867 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:18,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:18,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:18,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:18,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:18,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:18,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:18,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:18,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:18,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:18,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:18,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:18,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:18,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:19,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:19,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:19,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:19,162 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:19,163 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:19,163 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-11-06 19:18:19,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b51058aad/0d4680e9b34042fd8050ce722272228c/FLAGbbd9cf270 [2019-11-06 19:18:19,905 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:19,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-11-06 19:18:19,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b51058aad/0d4680e9b34042fd8050ce722272228c/FLAGbbd9cf270 [2019-11-06 19:18:20,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b51058aad/0d4680e9b34042fd8050ce722272228c [2019-11-06 19:18:20,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:20,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:20,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:20,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:20,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:20,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0f1a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:20, skipping insertion in model container [2019-11-06 19:18:20,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:20" (1/1) ... [2019-11-06 19:18:20,072 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:20,142 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:21,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:21,183 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:21,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:21,552 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:21,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21 WrapperNode [2019-11-06 19:18:21,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:21,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:21,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:21,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:21,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:21,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:21,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:21,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:21,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (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 [2019-11-06 19:18:21,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:21,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:21,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:21,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:21,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:21,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:24,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:24,498 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:24,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:24 BoogieIcfgContainer [2019-11-06 19:18:24,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:24,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:24,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:24,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:24,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:20" (1/3) ... [2019-11-06 19:18:24,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509ba80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:24, skipping insertion in model container [2019-11-06 19:18:24,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21" (2/3) ... [2019-11-06 19:18:24,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509ba80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:24, skipping insertion in model container [2019-11-06 19:18:24,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:24" (3/3) ... [2019-11-06 19:18:24,508 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2019-11-06 19:18:24,518 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:24,527 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:24,539 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:24,570 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:24,570 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:24,570 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:24,570 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:24,570 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:24,571 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:24,571 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:24,571 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 19:18:24,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:24,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:24,613 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1301398987, now seen corresponding path program 1 times [2019-11-06 19:18:24,627 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:24,628 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6375728] [2019-11-06 19:18:24,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:25,090 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6375728] [2019-11-06 19:18:25,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:25,091 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:25,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461635602] [2019-11-06 19:18:25,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:25,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:25,117 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:30,290 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:18:30,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:30,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-06 19:18:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:30,329 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:30,329 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:30,343 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:18:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:18:30,517 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 52 [2019-11-06 19:18:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:30,519 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:18:30,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:18:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:18:30,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:30,545 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:30,552 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -498419979, now seen corresponding path program 1 times [2019-11-06 19:18:30,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:30,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656416004] [2019-11-06 19:18:30,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 90 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:31,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656416004] [2019-11-06 19:18:31,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276756283] [2019-11-06 19:18:31,059 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 [2019-11-06 19:18:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:31,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-06 19:18:31,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:31,314 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:18:31,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268720809] [2019-11-06 19:18:31,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:31,320 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:31,321 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:18:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:34,733 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-11-06 19:18:34,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:34,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-11-06 19:18:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:34,750 INFO L225 Difference]: With dead ends: 3129 [2019-11-06 19:18:34,751 INFO L226 Difference]: Without dead ends: 2104 [2019-11-06 19:18:34,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-11-06 19:18:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-11-06 19:18:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:18:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-11-06 19:18:34,859 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 234 [2019-11-06 19:18:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:34,862 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-11-06 19:18:34,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-11-06 19:18:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-11-06 19:18:34,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:34,878 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:35,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:35,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash 567814956, now seen corresponding path program 1 times [2019-11-06 19:18:35,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:35,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610096140] [2019-11-06 19:18:35,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:35,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610096140] [2019-11-06 19:18:35,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939271813] [2019-11-06 19:18:35,507 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 [2019-11-06 19:18:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:35,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:35,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-06 19:18:35,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:35,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:35,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256248066] [2019-11-06 19:18:35,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:35,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:35,725 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-11-06 19:18:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:38,602 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-11-06 19:18:38,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:38,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 269 [2019-11-06 19:18:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:38,631 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:38,631 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:38,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-11-06 19:18:38,774 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 269 [2019-11-06 19:18:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:38,775 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-11-06 19:18:38,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-11-06 19:18:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-11-06 19:18:38,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:38,782 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:38,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:38,986 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash -848339884, now seen corresponding path program 1 times [2019-11-06 19:18:38,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:38,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049518468] [2019-11-06 19:18:38,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:39,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049518468] [2019-11-06 19:18:39,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962623873] [2019-11-06 19:18:39,416 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 [2019-11-06 19:18:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:39,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:39,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:39,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:39,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344042754] [2019-11-06 19:18:39,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:39,651 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:39,652 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-11-06 19:18:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:46,923 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-11-06 19:18:46,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:46,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2019-11-06 19:18:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:46,968 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:46,969 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:46,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-11-06 19:18:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-11-06 19:18:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-11-06 19:18:47,177 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 281 [2019-11-06 19:18:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:47,179 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-11-06 19:18:47,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-11-06 19:18:47,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2019-11-06 19:18:47,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:47,199 INFO L410 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:47,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:47,403 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:47,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1589807869, now seen corresponding path program 1 times [2019-11-06 19:18:47,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:47,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527094090] [2019-11-06 19:18:47,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 180 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-11-06 19:18:48,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527094090] [2019-11-06 19:18:48,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180242156] [2019-11-06 19:18:48,136 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 [2019-11-06 19:18:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:48,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:48,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-11-06 19:18:48,722 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:48,722 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:48,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348040255] [2019-11-06 19:18:48,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:48,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:48,725 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-11-06 19:18:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:50,371 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-11-06 19:18:50,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:50,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 550 [2019-11-06 19:18:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:50,407 INFO L225 Difference]: With dead ends: 13172 [2019-11-06 19:18:50,408 INFO L226 Difference]: Without dead ends: 7279 [2019-11-06 19:18:50,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-11-06 19:18:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-11-06 19:18:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-11-06 19:18:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-11-06 19:18:50,583 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 550 [2019-11-06 19:18:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:50,583 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-11-06 19:18:50,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-11-06 19:18:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2019-11-06 19:18:50,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:50,609 INFO L410 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:50,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:50,813 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1655123335, now seen corresponding path program 1 times [2019-11-06 19:18:50,814 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:50,815 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524056850] [2019-11-06 19:18:50,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 300 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-06 19:18:51,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524056850] [2019-11-06 19:18:51,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658115008] [2019-11-06 19:18:51,743 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 [2019-11-06 19:18:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:51,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 674 proven. 2 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-06 19:18:52,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:52,411 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:52,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317461923] [2019-11-06 19:18:52,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:52,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:52,415 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states.