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/Problem10_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:58:07,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:58:07,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:58:07,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:58:07,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:58:07,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:58:07,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:58:07,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:58:07,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:58:07,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:58:07,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:58:07,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:58:07,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:58:07,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:58:07,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:58:07,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:58:07,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:58:07,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:58:07,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:58:07,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:58:07,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:58:07,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:58:07,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:58:07,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:58:07,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:58:07,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:58:07,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:58:07,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:58:07,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:58:07,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:58:07,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:58:07,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:58:07,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:58:07,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:58:07,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:58:07,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:58:07,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:58:07,635 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:58:07,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:58:07,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:58:07,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:58:07,637 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:58:07,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:58:07,637 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:58:07,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:58:07,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:58:07,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:58:07,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:58:07,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:58:07,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:58:07,639 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:58:07,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:58:07,639 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:58:07,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:58:07,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:58:07,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:58:07,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:58:07,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:58:07,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:07,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:58:07,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:58:07,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:58:07,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:58:07,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:58:07,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:58:07,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:58:07,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:58:07,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:58:07,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:58:07,937 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:58:07,937 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:58:07,938 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-14 21:58:08,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f819b798/f220dce7ba01492f9d24fafd5129febd/FLAG6cdab0b39 [2019-10-14 21:58:08,541 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:58:08,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-14 21:58:08,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f819b798/f220dce7ba01492f9d24fafd5129febd/FLAG6cdab0b39 [2019-10-14 21:58:08,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f819b798/f220dce7ba01492f9d24fafd5129febd [2019-10-14 21:58:08,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:58:08,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:58:08,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:08,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:58:08,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:58:08,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:08" (1/1) ... [2019-10-14 21:58:08,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419573bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:08, skipping insertion in model container [2019-10-14 21:58:08,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:08" (1/1) ... [2019-10-14 21:58:08,891 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:58:08,934 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:58:09,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:09,509 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:58:09,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:09,645 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:58:09,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09 WrapperNode [2019-10-14 21:58:09,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:09,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:58:09,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:58:09,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:58:09,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... [2019-10-14 21:58:09,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:58:09,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:58:09,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:58:09,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:58:09,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:58:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:58:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:58:09,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:58:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:58:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:58:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:58:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:58:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:58:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:58:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:58:11,234 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:58:11,234 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:58:11,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:11 BoogieIcfgContainer [2019-10-14 21:58:11,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:58:11,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:58:11,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:58:11,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:58:11,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:08" (1/3) ... [2019-10-14 21:58:11,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0b0b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:11, skipping insertion in model container [2019-10-14 21:58:11,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:09" (2/3) ... [2019-10-14 21:58:11,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0b0b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:11, skipping insertion in model container [2019-10-14 21:58:11,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:11" (3/3) ... [2019-10-14 21:58:11,244 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label58.c [2019-10-14 21:58:11,254 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:58:11,263 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:58:11,275 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:58:11,301 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:58:11,302 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:58:11,302 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:58:11,302 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:58:11,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:58:11,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:58:11,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:58:11,303 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:58:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:58:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:58:11,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:11,335 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:11,337 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:11,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1079521594, now seen corresponding path program 1 times [2019-10-14 21:58:11,352 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:11,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348056500] [2019-10-14 21:58:11,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:11,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:11,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:11,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348056500] [2019-10-14 21:58:11,723 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:11,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:58:11,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036067316] [2019-10-14 21:58:11,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:11,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:58:11,752 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:58:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:13,663 INFO L93 Difference]: Finished difference Result 745 states and 1315 transitions. [2019-10-14 21:58:13,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:13,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-14 21:58:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:13,683 INFO L225 Difference]: With dead ends: 745 [2019-10-14 21:58:13,683 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:58:13,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:58:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-14 21:58:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-14 21:58:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 640 transitions. [2019-10-14 21:58:13,769 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 640 transitions. Word has length 19 [2019-10-14 21:58:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:13,769 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 640 transitions. [2019-10-14 21:58:13,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 640 transitions. [2019-10-14 21:58:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 21:58:13,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:13,780 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:58:13,781 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1696713450, now seen corresponding path program 1 times [2019-10-14 21:58:13,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:13,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080169678] [2019-10-14 21:58:13,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:13,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:13,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:14,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080169678] [2019-10-14 21:58:14,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:14,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:58:14,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999212245] [2019-10-14 21:58:14,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:58:14,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:58:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:58:14,183 INFO L87 Difference]: Start difference. First operand 443 states and 640 transitions. Second operand 9 states. [2019-10-14 21:58:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:16,095 INFO L93 Difference]: Finished difference Result 1786 states and 2735 transitions. [2019-10-14 21:58:16,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:58:16,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2019-10-14 21:58:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:16,107 INFO L225 Difference]: With dead ends: 1786 [2019-10-14 21:58:16,107 INFO L226 Difference]: Without dead ends: 1349 [2019-10-14 21:58:16,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:58:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-10-14 21:58:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1186. [2019-10-14 21:58:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2019-10-14 21:58:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1682 transitions. [2019-10-14 21:58:16,211 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1682 transitions. Word has length 93 [2019-10-14 21:58:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:16,212 INFO L462 AbstractCegarLoop]: Abstraction has 1186 states and 1682 transitions. [2019-10-14 21:58:16,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:58:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1682 transitions. [2019-10-14 21:58:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:58:16,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:16,218 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:58:16,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash -921580439, now seen corresponding path program 1 times [2019-10-14 21:58:16,220 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:16,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981913165] [2019-10-14 21:58:16,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:16,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:16,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:16,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981913165] [2019-10-14 21:58:16,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208848150] [2019-10-14 21:58:16,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:16,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:16,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:16,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:16,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:16,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069242732] [2019-10-14 21:58:16,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:16,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:16,566 INFO L87 Difference]: Start difference. First operand 1186 states and 1682 transitions. Second operand 3 states. [2019-10-14 21:58:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:17,274 INFO L93 Difference]: Finished difference Result 2807 states and 4071 transitions. [2019-10-14 21:58:17,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:17,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-14 21:58:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:17,291 INFO L225 Difference]: With dead ends: 2807 [2019-10-14 21:58:17,292 INFO L226 Difference]: Without dead ends: 1627 [2019-10-14 21:58:17,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-14 21:58:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1627. [2019-10-14 21:58:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2019-10-14 21:58:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2303 transitions. [2019-10-14 21:58:17,391 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2303 transitions. Word has length 98 [2019-10-14 21:58:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:17,393 INFO L462 AbstractCegarLoop]: Abstraction has 1627 states and 2303 transitions. [2019-10-14 21:58:17,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2303 transitions. [2019-10-14 21:58:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 21:58:17,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:17,404 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:58:17,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:17,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1133582729, now seen corresponding path program 1 times [2019-10-14 21:58:17,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:17,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850483189] [2019-10-14 21:58:17,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:17,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:17,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:17,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850483189] [2019-10-14 21:58:17,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:17,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:58:17,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419412269] [2019-10-14 21:58:17,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:58:17,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:17,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:58:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:58:17,918 INFO L87 Difference]: Start difference. First operand 1627 states and 2303 transitions. Second operand 9 states. [2019-10-14 21:58:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:19,099 INFO L93 Difference]: Finished difference Result 4045 states and 6031 transitions. [2019-10-14 21:58:19,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:58:19,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-14 21:58:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:19,115 INFO L225 Difference]: With dead ends: 4045 [2019-10-14 21:58:19,115 INFO L226 Difference]: Without dead ends: 2424 [2019-10-14 21:58:19,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:58:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2019-10-14 21:58:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1794. [2019-10-14 21:58:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1794 states. [2019-10-14 21:58:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2320 transitions. [2019-10-14 21:58:19,200 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2320 transitions. Word has length 114 [2019-10-14 21:58:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:19,200 INFO L462 AbstractCegarLoop]: Abstraction has 1794 states and 2320 transitions. [2019-10-14 21:58:19,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:58:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2320 transitions. [2019-10-14 21:58:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 21:58:19,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:19,204 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:19,204 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1256803409, now seen corresponding path program 1 times [2019-10-14 21:58:19,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:19,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914008368] [2019-10-14 21:58:19,206 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:19,206 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:19,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-14 21:58:19,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914008368] [2019-10-14 21:58:19,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551049051] [2019-10-14 21:58:19,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:19,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:19,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:58:19,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:19,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:19,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138393682] [2019-10-14 21:58:19,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:19,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:19,584 INFO L87 Difference]: Start difference. First operand 1794 states and 2320 transitions. Second operand 3 states. [2019-10-14 21:58:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:20,185 INFO L93 Difference]: Finished difference Result 3882 states and 5082 transitions. [2019-10-14 21:58:20,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:20,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-14 21:58:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:20,197 INFO L225 Difference]: With dead ends: 3882 [2019-10-14 21:58:20,198 INFO L226 Difference]: Without dead ends: 2094 [2019-10-14 21:58:20,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-10-14 21:58:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2019-10-14 21:58:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-14 21:58:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2721 transitions. [2019-10-14 21:58:20,261 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2721 transitions. Word has length 186 [2019-10-14 21:58:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:20,261 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2721 transitions. [2019-10-14 21:58:20,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2721 transitions. [2019-10-14 21:58:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:58:20,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:20,266 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:20,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:20,470 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash 566553090, now seen corresponding path program 1 times [2019-10-14 21:58:20,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:20,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273797437] [2019-10-14 21:58:20,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:20,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:20,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:20,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273797437] [2019-10-14 21:58:20,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727413438] [2019-10-14 21:58:20,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:20,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:21,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:21,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:21,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:58:21,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437412114] [2019-10-14 21:58:21,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:58:21,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:58:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:58:21,098 INFO L87 Difference]: Start difference. First operand 2092 states and 2721 transitions. Second operand 11 states. [2019-10-14 21:58:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:23,401 INFO L93 Difference]: Finished difference Result 4206 states and 5495 transitions. [2019-10-14 21:58:23,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:58:23,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 203 [2019-10-14 21:58:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:23,415 INFO L225 Difference]: With dead ends: 4206 [2019-10-14 21:58:23,415 INFO L226 Difference]: Without dead ends: 2120 [2019-10-14 21:58:23,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:58:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2019-10-14 21:58:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2094. [2019-10-14 21:58:23,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-10-14 21:58:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2629 transitions. [2019-10-14 21:58:23,474 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2629 transitions. Word has length 203 [2019-10-14 21:58:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:23,474 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2629 transitions. [2019-10-14 21:58:23,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:58:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2629 transitions. [2019-10-14 21:58:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-14 21:58:23,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:23,479 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:23,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:23,687 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 405320705, now seen corresponding path program 1 times [2019-10-14 21:58:23,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:23,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140582868] [2019-10-14 21:58:23,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:23,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:23,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140582868] [2019-10-14 21:58:24,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106975095] [2019-10-14 21:58:24,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:24,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:24,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:24,272 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:24,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:58:24,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022329712] [2019-10-14 21:58:24,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:58:24,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:24,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:58:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:58:24,277 INFO L87 Difference]: Start difference. First operand 2094 states and 2629 transitions. Second operand 11 states. [2019-10-14 21:58:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:27,050 INFO L93 Difference]: Finished difference Result 4379 states and 5549 transitions. [2019-10-14 21:58:27,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:58:27,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 210 [2019-10-14 21:58:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:27,062 INFO L225 Difference]: With dead ends: 4379 [2019-10-14 21:58:27,062 INFO L226 Difference]: Without dead ends: 2291 [2019-10-14 21:58:27,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:58:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2019-10-14 21:58:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1961. [2019-10-14 21:58:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2019-10-14 21:58:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2362 transitions. [2019-10-14 21:58:27,127 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2362 transitions. Word has length 210 [2019-10-14 21:58:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:27,128 INFO L462 AbstractCegarLoop]: Abstraction has 1961 states and 2362 transitions. [2019-10-14 21:58:27,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:58:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2362 transitions. [2019-10-14 21:58:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 21:58:27,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:27,133 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:27,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:27,337 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash -908083558, now seen corresponding path program 1 times [2019-10-14 21:58:27,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:27,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293510608] [2019-10-14 21:58:27,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:27,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:27,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:27,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293510608] [2019-10-14 21:58:27,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024972342] [2019-10-14 21:58:27,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:27,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:27,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:27,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:27,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-14 21:58:27,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402518040] [2019-10-14 21:58:27,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:58:27,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:27,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:58:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:58:27,962 INFO L87 Difference]: Start difference. First operand 1961 states and 2362 transitions. Second operand 13 states. [2019-10-14 21:58:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:31,645 INFO L93 Difference]: Finished difference Result 6083 states and 7281 transitions. [2019-10-14 21:58:31,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:58:31,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2019-10-14 21:58:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:31,665 INFO L225 Difference]: With dead ends: 6083 [2019-10-14 21:58:31,665 INFO L226 Difference]: Without dead ends: 2664 [2019-10-14 21:58:31,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:58:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2019-10-14 21:58:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1937. [2019-10-14 21:58:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-10-14 21:58:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2150 transitions. [2019-10-14 21:58:31,716 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2150 transitions. Word has length 219 [2019-10-14 21:58:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:31,716 INFO L462 AbstractCegarLoop]: Abstraction has 1937 states and 2150 transitions. [2019-10-14 21:58:31,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:58:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2150 transitions. [2019-10-14 21:58:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-14 21:58:31,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:31,724 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:31,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:31,928 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash -836157958, now seen corresponding path program 1 times [2019-10-14 21:58:31,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:31,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752206406] [2019-10-14 21:58:31,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:31,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:31,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-14 21:58:32,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752206406] [2019-10-14 21:58:32,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911359818] [2019-10-14 21:58:32,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:32,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:58:32,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:32,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:32,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:34,742 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2019-10-14 21:58:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:34,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:34,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 21:58:34,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524148472] [2019-10-14 21:58:34,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:58:34,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:58:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:58:34,925 INFO L87 Difference]: Start difference. First operand 1937 states and 2150 transitions. Second operand 17 states. [2019-10-14 21:58:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:42,264 INFO L93 Difference]: Finished difference Result 6989 states and 7970 transitions. [2019-10-14 21:58:42,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:58:42,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 275 [2019-10-14 21:58:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:42,285 INFO L225 Difference]: With dead ends: 6989 [2019-10-14 21:58:42,285 INFO L226 Difference]: Without dead ends: 4909 [2019-10-14 21:58:42,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:58:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2019-10-14 21:58:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3411. [2019-10-14 21:58:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3411 states. [2019-10-14 21:58:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 3816 transitions. [2019-10-14 21:58:42,382 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 3816 transitions. Word has length 275 [2019-10-14 21:58:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:42,382 INFO L462 AbstractCegarLoop]: Abstraction has 3411 states and 3816 transitions. [2019-10-14 21:58:42,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:58:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 3816 transitions. [2019-10-14 21:58:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-14 21:58:42,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:42,394 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:42,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:42,599 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash 671143510, now seen corresponding path program 1 times [2019-10-14 21:58:42,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:42,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414312025] [2019-10-14 21:58:42,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:42,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:42,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 44 proven. 279 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:58:43,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414312025] [2019-10-14 21:58:43,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235608888] [2019-10-14 21:58:43,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:43,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:58:43,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:43,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:43,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms