/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/Problem03_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:01:00,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:01:00,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:01:00,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:01:00,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:01:00,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:01:00,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:01:00,590 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 19:01:00,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:01:00,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:01:00,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:01:00,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:01:00,622 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:01:00,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:01:00,622 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:01:00,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:01:00,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:01:00,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:01:00,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:01:00,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:01:00,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:01:00,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:01:00,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:01:00,624 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:01:00,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:01:00,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:01:00,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:01:00,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:01:00,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:01:00,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:01:00,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:01:00,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:01:00,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:01:00,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:01:00,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:01:00,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:01:00,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:01:00,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:01:00,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:01:00,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:01:00,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:01:00,911 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:01:00,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-11-06 19:01:00,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a22d7c1/dc4511101ef4453bb8203fe4ad380191/FLAGc2d40b4e6 [2019-11-06 19:01:01,607 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:01:01,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-11-06 19:01:01,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a22d7c1/dc4511101ef4453bb8203fe4ad380191/FLAGc2d40b4e6 [2019-11-06 19:01:01,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a22d7c1/dc4511101ef4453bb8203fe4ad380191 [2019-11-06 19:01:01,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:01:01,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:01:01,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:01,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:01:01,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:01:01,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:01" (1/1) ... [2019-11-06 19:01:01,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f03f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:01, skipping insertion in model container [2019-11-06 19:01:01,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:01" (1/1) ... [2019-11-06 19:01:01,841 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:01:01,912 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:01:02,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:02,804 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:01:03,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:03,291 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:01:03,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03 WrapperNode [2019-11-06 19:01:03,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:03,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:01:03,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:01:03,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:01:03,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (1/1) ... [2019-11-06 19:01:03,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:01:03,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:01:03,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:01:03,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:01:03,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (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 19:01:03,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:01:03,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:01:03,545 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:01:03,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:01:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:01:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:01:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:01:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:01:03,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:01:03,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:01:03,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:01:05,491 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:01:05,492 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:01:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:05 BoogieIcfgContainer [2019-11-06 19:01:05,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:01:05,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:01:05,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:01:05,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:01:05,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:01:01" (1/3) ... [2019-11-06 19:01:05,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc1357d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:05, skipping insertion in model container [2019-11-06 19:01:05,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:03" (2/3) ... [2019-11-06 19:01:05,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc1357d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:05, skipping insertion in model container [2019-11-06 19:01:05,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:05" (3/3) ... [2019-11-06 19:01:05,511 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2019-11-06 19:01:05,526 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:01:05,538 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:01:05,551 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:01:05,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:01:05,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:01:05,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:01:05,600 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:01:05,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:01:05,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:01:05,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:01:05,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:01:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:01:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 19:01:05,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:05,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:05,685 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2093619232, now seen corresponding path program 1 times [2019-11-06 19:01:05,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:05,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801733043] [2019-11-06 19:01:05,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:06,738 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:06,906 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 19:01:06,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801733043] [2019-11-06 19:01:06,908 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:06,908 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:01:06,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970974887] [2019-11-06 19:01:06,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:06,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:06,933 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:01:07,146 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:07,624 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:11,424 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-11-06 19:01:11,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:11,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-11-06 19:01:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:11,451 INFO L225 Difference]: With dead ends: 1107 [2019-11-06 19:01:11,452 INFO L226 Difference]: Without dead ends: 699 [2019-11-06 19:01:11,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-06 19:01:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-11-06 19:01:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-11-06 19:01:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-11-06 19:01:11,561 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 207 [2019-11-06 19:01:11,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:11,566 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-11-06 19:01:11,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-11-06 19:01:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 19:01:11,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:11,577 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:11,579 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1254940916, now seen corresponding path program 1 times [2019-11-06 19:01:11,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:11,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021175928] [2019-11-06 19:01:11,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:11,949 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:12,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021175928] [2019-11-06 19:01:12,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807318360] [2019-11-06 19:01:12,150 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 19:01:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:12,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:12,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:12,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:12,661 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:01:12,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940101035] [2019-11-06 19:01:12,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:12,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:12,671 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-11-06 19:01:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:13,773 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-11-06 19:01:13,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:13,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-11-06 19:01:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:13,780 INFO L225 Difference]: With dead ends: 1364 [2019-11-06 19:01:13,780 INFO L226 Difference]: Without dead ends: 896 [2019-11-06 19:01:13,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-11-06 19:01:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-11-06 19:01:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-06 19:01:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-11-06 19:01:13,823 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 219 [2019-11-06 19:01:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:13,824 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-11-06 19:01:13,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-11-06 19:01:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:01:13,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:13,829 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:14,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:14,040 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:14,040 INFO L82 PathProgramCache]: Analyzing trace with hash 536359495, now seen corresponding path program 1 times [2019-11-06 19:01:14,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:14,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640742795] [2019-11-06 19:01:14,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:14,326 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:14,700 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640742795] [2019-11-06 19:01:14,701 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:14,701 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:14,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723866049] [2019-11-06 19:01:14,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:14,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:14,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:14,712 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-11-06 19:01:14,879 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:15,398 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:18,229 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-11-06 19:01:18,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:01:18,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 234 [2019-11-06 19:01:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:18,243 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:01:18,243 INFO L226 Difference]: Without dead ends: 1358 [2019-11-06 19:01:18,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:01:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-11-06 19:01:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-11-06 19:01:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-11-06 19:01:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-11-06 19:01:18,293 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 234 [2019-11-06 19:01:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:18,294 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-11-06 19:01:18,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-11-06 19:01:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 19:01:18,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:18,300 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:18,300 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1119665401, now seen corresponding path program 1 times [2019-11-06 19:01:18,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:18,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787615602] [2019-11-06 19:01:18,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:18,543 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:18,725 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:18,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787615602] [2019-11-06 19:01:18,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:18,935 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:18,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961867053] [2019-11-06 19:01:18,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:18,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:18,939 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-11-06 19:01:19,090 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:19,606 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:01:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:22,596 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-11-06 19:01:22,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:01:22,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 241 [2019-11-06 19:01:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:22,619 INFO L225 Difference]: With dead ends: 4018 [2019-11-06 19:01:22,619 INFO L226 Difference]: Without dead ends: 2692 [2019-11-06 19:01:22,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:01:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-11-06 19:01:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-11-06 19:01:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:01:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3619 transitions. [2019-11-06 19:01:22,740 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3619 transitions. Word has length 241 [2019-11-06 19:01:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:22,740 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3619 transitions. [2019-11-06 19:01:22,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3619 transitions. [2019-11-06 19:01:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-06 19:01:22,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:22,753 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:22,753 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash -850359650, now seen corresponding path program 1 times [2019-11-06 19:01:22,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:22,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291505457] [2019-11-06 19:01:22,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:22,998 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:23,127 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:01:23,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291505457] [2019-11-06 19:01:23,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425807762] [2019-11-06 19:01:23,270 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 19:01:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:23,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:23,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:01:23,574 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:23,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:01:23,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948031926] [2019-11-06 19:01:23,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:23,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:23,577 INFO L87 Difference]: Start difference. First operand 2654 states and 3619 transitions. Second operand 3 states. [2019-11-06 19:01:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:24,543 INFO L93 Difference]: Finished difference Result 5304 states and 7251 transitions. [2019-11-06 19:01:24,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:24,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2019-11-06 19:01:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:24,558 INFO L225 Difference]: With dead ends: 5304 [2019-11-06 19:01:24,558 INFO L226 Difference]: Without dead ends: 2656 [2019-11-06 19:01:24,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-11-06 19:01:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-11-06 19:01:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:01:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3493 transitions. [2019-11-06 19:01:24,678 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3493 transitions. Word has length 243 [2019-11-06 19:01:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:24,679 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3493 transitions. [2019-11-06 19:01:24,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3493 transitions. [2019-11-06 19:01:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-11-06 19:01:24,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:24,690 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:24,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:24,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash 476797618, now seen corresponding path program 1 times [2019-11-06 19:01:24,894 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:24,895 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821802146] [2019-11-06 19:01:24,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:25,236 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:25,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821802146] [2019-11-06 19:01:25,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279457656] [2019-11-06 19:01:25,414 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 19:01:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:25,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:01:25,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:25,687 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:25,687 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:01:25,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082230223] [2019-11-06 19:01:25,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:25,688 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:25,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:25,689 INFO L87 Difference]: Start difference. First operand 2654 states and 3493 transitions. Second operand 3 states. [2019-11-06 19:01:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:26,794 INFO L93 Difference]: Finished difference Result 7854 states and 10598 transitions. [2019-11-06 19:01:26,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:26,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2019-11-06 19:01:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:26,824 INFO L225 Difference]: With dead ends: 7854 [2019-11-06 19:01:26,824 INFO L226 Difference]: Without dead ends: 5206 [2019-11-06 19:01:26,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-11-06 19:01:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-11-06 19:01:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-11-06 19:01:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6852 transitions. [2019-11-06 19:01:26,963 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6852 transitions. Word has length 252 [2019-11-06 19:01:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:26,964 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6852 transitions. [2019-11-06 19:01:26,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6852 transitions. [2019-11-06 19:01:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-06 19:01:26,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:26,984 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:27,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:27,189 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:27,190 INFO L82 PathProgramCache]: Analyzing trace with hash -944811427, now seen corresponding path program 1 times [2019-11-06 19:01:27,190 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:27,190 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414241749] [2019-11-06 19:01:27,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,415 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:01:27,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414241749] [2019-11-06 19:01:27,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286621992] [2019-11-06 19:01:27,673 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 19:01:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:01:27,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 19:01:28,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:28,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:01:28,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158315280] [2019-11-06 19:01:28,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:28,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:28,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:01:28,043 INFO L87 Difference]: Start difference. First operand 5200 states and 6852 transitions. Second operand 5 states. [2019-11-06 19:01:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:29,446 INFO L93 Difference]: Finished difference Result 10482 states and 14336 transitions. [2019-11-06 19:01:29,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:29,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2019-11-06 19:01:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:29,473 INFO L225 Difference]: With dead ends: 10482 [2019-11-06 19:01:29,473 INFO L226 Difference]: Without dead ends: 5288 [2019-11-06 19:01:29,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:01:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-11-06 19:01:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-11-06 19:01:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-11-06 19:01:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6776 transitions. [2019-11-06 19:01:29,615 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6776 transitions. Word has length 258 [2019-11-06 19:01:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:29,616 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6776 transitions. [2019-11-06 19:01:29,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6776 transitions. [2019-11-06 19:01:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-11-06 19:01:29,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:29,631 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:29,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:29,835 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1466681545, now seen corresponding path program 1 times [2019-11-06 19:01:29,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:29,836 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265793349] [2019-11-06 19:01:29,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,090 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:01:30,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265793349] [2019-11-06 19:01:30,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41610310] [2019-11-06 19:01:30,367 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 19:01:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:30,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:01:30,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:01:30,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:01:30,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793291042] [2019-11-06 19:01:30,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:01:30,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:01:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:01:30,719 INFO L87 Difference]: Start difference. First operand 5216 states and 6776 transitions. Second operand 11 states. [2019-11-06 19:01:30,851 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:31,126 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-11-06 19:01:33,128 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:35,160 INFO L93 Difference]: Finished difference Result 15091 states and 22090 transitions. [2019-11-06 19:01:35,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:01:35,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 270 [2019-11-06 19:01:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:35,252 INFO L225 Difference]: With dead ends: 15091 [2019-11-06 19:01:35,252 INFO L226 Difference]: Without dead ends: 9881 [2019-11-06 19:01:35,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:01:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2019-11-06 19:01:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 9602. [2019-11-06 19:01:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9602 states. [2019-11-06 19:01:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 12278 transitions. [2019-11-06 19:01:35,706 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 12278 transitions. Word has length 270 [2019-11-06 19:01:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:35,706 INFO L462 AbstractCegarLoop]: Abstraction has 9602 states and 12278 transitions. [2019-11-06 19:01:35,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:01:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 12278 transitions. [2019-11-06 19:01:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-11-06 19:01:35,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:35,733 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:35,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:35,946 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 507873321, now seen corresponding path program 1 times [2019-11-06 19:01:35,947 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:35,947 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548190057] [2019-11-06 19:01:35,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,214 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:01:36,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548190057] [2019-11-06 19:01:36,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12226643] [2019-11-06 19:01:36,473 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 [2019-11-06 19:01:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:01:36,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:36,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:01:36,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:01:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 19:01:36,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:36,854 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-11-06 19:01:36,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521379633] [2019-11-06 19:01:36,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:01:36,855 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:36,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:01:36,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:01:36,856 INFO L87 Difference]: Start difference. First operand 9602 states and 12278 transitions. Second operand 6 states.