/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/Problem14_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:59,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:59,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:59,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:59,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:59,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:59,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:59,291 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 19:14:59,319 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:59,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:59,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:59,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:59,321 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:59,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:59,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:59,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:59,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:59,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:59,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:59,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:59,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:59,323 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:59,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:59,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:59,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:59,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:59,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:59,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:59,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:59,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:59,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:59,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:59,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:59,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:59,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:59,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:59,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:59,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:59,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:59,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:59,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:59,627 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:59,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-11-06 19:14:59,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba078efe7/53220a853dc6424eb62394d388e84dd8/FLAGddfc342d9 [2019-11-06 19:15:00,310 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:00,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-11-06 19:15:00,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba078efe7/53220a853dc6424eb62394d388e84dd8/FLAGddfc342d9 [2019-11-06 19:15:00,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba078efe7/53220a853dc6424eb62394d388e84dd8 [2019-11-06 19:15:00,620 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:00,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:00,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:00,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:00,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:00,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:00" (1/1) ... [2019-11-06 19:15:00,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473fe89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:00, skipping insertion in model container [2019-11-06 19:15:00,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:00" (1/1) ... [2019-11-06 19:15:00,640 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:00,713 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:01,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:01,311 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:01,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:01,470 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:01,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01 WrapperNode [2019-11-06 19:15:01,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:01,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:01,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:01,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:01,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (1/1) ... [2019-11-06 19:15:01,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:01,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:01,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:01,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:01,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (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 19:15:01,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:01,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:01,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:01,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:03,455 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:03,455 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:03,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:03 BoogieIcfgContainer [2019-11-06 19:15:03,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:03,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:03,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:03,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:03,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:00" (1/3) ... [2019-11-06 19:15:03,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b699987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:03, skipping insertion in model container [2019-11-06 19:15:03,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:01" (2/3) ... [2019-11-06 19:15:03,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b699987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:03, skipping insertion in model container [2019-11-06 19:15:03,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:03" (3/3) ... [2019-11-06 19:15:03,479 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label57.c [2019-11-06 19:15:03,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:03,500 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:03,512 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:03,551 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:03,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:03,551 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:03,552 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:03,552 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:03,552 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:03,552 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:03,553 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:15:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 19:15:03,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:03,590 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] [2019-11-06 19:15:03,592 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:03,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1500027043, now seen corresponding path program 1 times [2019-11-06 19:15:03,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:03,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880237028] [2019-11-06 19:15:03,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:03,968 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 19:15:03,969 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880237028] [2019-11-06 19:15:03,970 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:03,971 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:03,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995594716] [2019-11-06 19:15:03,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:03,979 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:03,997 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:15:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:06,518 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:15:06,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:06,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-06 19:15:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:06,548 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:15:06,548 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:15:06,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:15:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:15:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:15:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:15:06,677 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 36 [2019-11-06 19:15:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:06,678 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:15:06,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:15:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 19:15:06,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:06,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:06,695 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1488834266, now seen corresponding path program 1 times [2019-11-06 19:15:06,698 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:06,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250135272] [2019-11-06 19:15:06,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250135272] [2019-11-06 19:15:07,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:07,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:15:07,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020974780] [2019-11-06 19:15:07,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:07,120 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:07,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:07,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:07,121 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:15:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:09,029 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:15:09,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:15:09,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-06 19:15:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:09,038 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:15:09,038 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:15:09,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:15:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:15:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:15:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:15:09,090 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 122 [2019-11-06 19:15:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:09,093 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:15:09,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:15:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 19:15:09,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:09,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:09,099 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash -753448615, now seen corresponding path program 1 times [2019-11-06 19:15:09,100 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:09,100 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362341306] [2019-11-06 19:15:09,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:09,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362341306] [2019-11-06 19:15:09,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435595844] [2019-11-06 19:15:09,359 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 19:15:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:09,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:09,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:09,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:09,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:09,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715506525] [2019-11-06 19:15:09,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:09,590 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:09,591 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:15:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:10,546 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-11-06 19:15:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:10,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-11-06 19:15:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:10,553 INFO L225 Difference]: With dead ends: 1680 [2019-11-06 19:15:10,554 INFO L226 Difference]: Without dead ends: 1120 [2019-11-06 19:15:10,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-06 19:15:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-11-06 19:15:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:15:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-11-06 19:15:10,594 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 131 [2019-11-06 19:15:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:10,595 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-11-06 19:15:10,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-11-06 19:15:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:15:10,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:10,600 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:10,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:10,810 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 89446293, now seen corresponding path program 1 times [2019-11-06 19:15:10,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:10,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022346486] [2019-11-06 19:15:10,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:15:11,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022346486] [2019-11-06 19:15:11,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305107157] [2019-11-06 19:15:11,142 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 19:15:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:11,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:15:11,380 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:11,380 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:11,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669549374] [2019-11-06 19:15:11,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:11,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:11,384 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-11-06 19:15:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:12,297 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-11-06 19:15:12,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:12,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-11-06 19:15:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:12,305 INFO L225 Difference]: With dead ends: 2414 [2019-11-06 19:15:12,306 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:15:12,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:15:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-11-06 19:15:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-11-06 19:15:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-11-06 19:15:12,356 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 234 [2019-11-06 19:15:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:12,357 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-11-06 19:15:12,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-11-06 19:15:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-11-06 19:15:12,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:12,363 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:12,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:12,575 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -5420906, now seen corresponding path program 1 times [2019-11-06 19:15:12,576 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:12,576 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871332604] [2019-11-06 19:15:12,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 19:15:12,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871332604] [2019-11-06 19:15:12,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265388739] [2019-11-06 19:15:12,936 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 19:15:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:13,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:15:13,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:13,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:15:13,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120651604] [2019-11-06 19:15:13,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:13,179 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:13,180 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-11-06 19:15:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:14,003 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-11-06 19:15:14,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:14,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2019-11-06 19:15:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:14,014 INFO L225 Difference]: With dead ends: 3156 [2019-11-06 19:15:14,014 INFO L226 Difference]: Without dead ends: 1858 [2019-11-06 19:15:14,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-11-06 19:15:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-11-06 19:15:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-06 19:15:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-11-06 19:15:14,071 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 253 [2019-11-06 19:15:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:14,071 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-11-06 19:15:14,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-11-06 19:15:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 19:15:14,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:14,077 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:14,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:14,281 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1175360854, now seen corresponding path program 1 times [2019-11-06 19:15:14,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:14,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067348706] [2019-11-06 19:15:14,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:14,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067348706] [2019-11-06 19:15:14,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460951776] [2019-11-06 19:15:14,650 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 19:15:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:14,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:14,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 19:15:14,897 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:14,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-11-06 19:15:14,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477126122] [2019-11-06 19:15:14,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:14,899 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:15:14,899 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-11-06 19:15:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:16,254 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-11-06 19:15:16,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:16,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-11-06 19:15:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:16,267 INFO L225 Difference]: With dead ends: 3930 [2019-11-06 19:15:16,267 INFO L226 Difference]: Without dead ends: 2262 [2019-11-06 19:15:16,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:15:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-11-06 19:15:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-11-06 19:15:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-11-06 19:15:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-11-06 19:15:16,341 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 259 [2019-11-06 19:15:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:16,341 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-11-06 19:15:16,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-11-06 19:15:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-11-06 19:15:16,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:16,349 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:16,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:16,554 INFO L82 PathProgramCache]: Analyzing trace with hash -518867421, now seen corresponding path program 1 times [2019-11-06 19:15:16,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:16,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992802033] [2019-11-06 19:15:16,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 97 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:15:17,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992802033] [2019-11-06 19:15:17,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595222863] [2019-11-06 19:15:17,610 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 19:15:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:17,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:17,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 283 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 19:15:17,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:17,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:15:17,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248660539] [2019-11-06 19:15:17,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:17,981 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:17,982 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-11-06 19:15:19,397 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-06 19:15:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:21,958 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-11-06 19:15:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:15:21,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 343 [2019-11-06 19:15:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:21,969 INFO L225 Difference]: With dead ends: 4460 [2019-11-06 19:15:21,969 INFO L226 Difference]: Without dead ends: 2349 [2019-11-06 19:15:21,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:15:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-11-06 19:15:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-11-06 19:15:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-11-06 19:15:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-11-06 19:15:22,045 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 343 [2019-11-06 19:15:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:22,046 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-11-06 19:15:22,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-11-06 19:15:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-11-06 19:15:22,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:22,057 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:22,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:22,269 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:22,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1390438032, now seen corresponding path program 1 times [2019-11-06 19:15:22,270 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:22,270 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597708499] [2019-11-06 19:15:22,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 165 proven. 146 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 19:15:23,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597708499] [2019-11-06 19:15:23,064 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491721110] [2019-11-06 19:15:23,064 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 19:15:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:23,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:23,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-06 19:15:23,321 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:23,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-11-06 19:15:23,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375106137] [2019-11-06 19:15:23,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:23,324 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:15:23,330 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-11-06 19:15:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:24,386 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-11-06 19:15:24,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:24,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2019-11-06 19:15:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:24,398 INFO L225 Difference]: With dead ends: 5098 [2019-11-06 19:15:24,399 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 19:15:24,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-11-06 19:15:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 19:15:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-11-06 19:15:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-11-06 19:15:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-11-06 19:15:24,471 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 368 [2019-11-06 19:15:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:24,472 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-11-06 19:15:24,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-11-06 19:15:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2019-11-06 19:15:24,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:24,513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:24,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:24,714 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1446760509, now seen corresponding path program 1 times [2019-11-06 19:15:24,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:24,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137683031] [2019-11-06 19:15:24,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:15:25,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137683031] [2019-11-06 19:15:25,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39237552] [2019-11-06 19:15:25,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:25,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 19:15:26,096 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:26,096 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:15:26,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793494249] [2019-11-06 19:15:26,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:26,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:26,100 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-11-06 19:15:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:28,042 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-11-06 19:15:28,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:15:28,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 478 [2019-11-06 19:15:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:28,055 INFO L225 Difference]: With dead ends: 5490 [2019-11-06 19:15:28,055 INFO L226 Difference]: Without dead ends: 2846 [2019-11-06 19:15:28,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-11-06 19:15:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-11-06 19:15:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-11-06 19:15:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-11-06 19:15:28,124 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 478 [2019-11-06 19:15:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:28,125 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-11-06 19:15:28,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-11-06 19:15:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-11-06 19:15:28,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:28,141 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:28,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:28,346 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash 171945148, now seen corresponding path program 1 times [2019-11-06 19:15:28,347 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:28,347 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696423039] [2019-11-06 19:15:28,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 463 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:15:29,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696423039] [2019-11-06 19:15:29,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082458376] [2019-11-06 19:15:29,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:29,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:15:29,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:29,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 836 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-06 19:15:30,235 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:30,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:15:30,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016624610] [2019-11-06 19:15:30,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:15:30,237 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:15:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:30,238 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-11-06 19:15:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:32,502 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-11-06 19:15:32,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:15:32,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 562 [2019-11-06 19:15:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:32,515 INFO L225 Difference]: With dead ends: 5780 [2019-11-06 19:15:32,515 INFO L226 Difference]: Without dead ends: 3085 [2019-11-06 19:15:32,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:15:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-11-06 19:15:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-11-06 19:15:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-11-06 19:15:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-11-06 19:15:32,587 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 562 [2019-11-06 19:15:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:32,588 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-11-06 19:15:32,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:15:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-11-06 19:15:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2019-11-06 19:15:32,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:32,599 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:32,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:32,803 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash 726916816, now seen corresponding path program 2 times [2019-11-06 19:15:32,805 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:32,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620412378] [2019-11-06 19:15:32,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 686 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-11-06 19:15:34,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620412378] [2019-11-06 19:15:34,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093500034] [2019-11-06 19:15:34,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:34,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:15:34,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:15:34,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:34,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:34,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 888 proven. 2 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2019-11-06 19:15:34,577 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:34,577 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:15:34,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769036163] [2019-11-06 19:15:34,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:15:34,579 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:15:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:34,579 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.