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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:40,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:40,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:40,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:40,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:40,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:40,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:40,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:40,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:40,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:40,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:40,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:40,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:40,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:40,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:40,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:40,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:40,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:40,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:40,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:40,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:40,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:40,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:40,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:40,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:40,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:40,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:40,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:40,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:40,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:40,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:40,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:40,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:40,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:40,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:40,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:40,703 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 [2019-10-13 18:03:40,717 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:40,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:40,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:40,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:40,718 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:40,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:40,719 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:40,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:40,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:40,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:40,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:40,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:40,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:40,720 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:40,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:40,721 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:40,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:40,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:40,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:40,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:40,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:40,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:40,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:40,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:40,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:40,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:40,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:40,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:40,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:40,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:41,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:41,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:41,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:41,009 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:41,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-13 18:03:41,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923d76cb4/5295e48ce09f44af9d1c5678abce5d80/FLAG9cf807573 [2019-10-13 18:03:41,639 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:41,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-13 18:03:41,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923d76cb4/5295e48ce09f44af9d1c5678abce5d80/FLAG9cf807573 [2019-10-13 18:03:41,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923d76cb4/5295e48ce09f44af9d1c5678abce5d80 [2019-10-13 18:03:41,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:41,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:41,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:41,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:41,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:41,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:41" (1/1) ... [2019-10-13 18:03:41,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405f9137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:41, skipping insertion in model container [2019-10-13 18:03:41,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:41" (1/1) ... [2019-10-13 18:03:41,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:41,983 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:42,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:42,520 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:42,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:42,685 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:42,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42 WrapperNode [2019-10-13 18:03:42,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:42,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:42,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:42,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:42,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (1/1) ... [2019-10-13 18:03:42,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:42,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:42,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:42,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:42,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (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 [2019-10-13 18:03:42,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:42,981 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:44,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:44,589 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:44,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:44 BoogieIcfgContainer [2019-10-13 18:03:44,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:44,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:44,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:44,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:44,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:41" (1/3) ... [2019-10-13 18:03:44,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7397a051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:44, skipping insertion in model container [2019-10-13 18:03:44,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:42" (2/3) ... [2019-10-13 18:03:44,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7397a051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:44, skipping insertion in model container [2019-10-13 18:03:44,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:44" (3/3) ... [2019-10-13 18:03:44,599 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label58.c [2019-10-13 18:03:44,608 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:44,616 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:44,627 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:44,654 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:44,654 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:44,654 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:44,654 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:44,656 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:44,656 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:44,656 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:44,657 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 18:03:44,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:44,689 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:44,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1699451235, now seen corresponding path program 1 times [2019-10-13 18:03:44,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:44,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127352365] [2019-10-13 18:03:44,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:44,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:45,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127352365] [2019-10-13 18:03:45,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:45,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:45,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145388514] [2019-10-13 18:03:45,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:45,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:45,068 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:47,563 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:03:47,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:47,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 18:03:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:47,585 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:03:47,585 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:47,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:03:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:03:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-10-13 18:03:47,697 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 20 [2019-10-13 18:03:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:47,697 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-10-13 18:03:47,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-10-13 18:03:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 18:03:47,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:47,710 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:47,710 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash 72862738, now seen corresponding path program 1 times [2019-10-13 18:03:47,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:47,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156914571] [2019-10-13 18:03:47,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:47,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:47,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:48,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156914571] [2019-10-13 18:03:48,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191212284] [2019-10-13 18:03:48,092 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 [2019-10-13 18:03:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:48,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:48,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:48,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:48,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709801465] [2019-10-13 18:03:48,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:48,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:48,251 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-10-13 18:03:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:49,125 INFO L93 Difference]: Finished difference Result 1114 states and 1633 transitions. [2019-10-13 18:03:49,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:49,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-13 18:03:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:49,134 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 18:03:49,134 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:03:49,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:03:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 744. [2019-10-13 18:03:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 18:03:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1117 transitions. [2019-10-13 18:03:49,178 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1117 transitions. Word has length 132 [2019-10-13 18:03:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:49,179 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1117 transitions. [2019-10-13 18:03:49,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1117 transitions. [2019-10-13 18:03:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 18:03:49,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:49,183 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:49,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:49,387 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash -700382803, now seen corresponding path program 1 times [2019-10-13 18:03:49,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:49,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505442112] [2019-10-13 18:03:49,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:49,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:49,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:49,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505442112] [2019-10-13 18:03:49,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207089293] [2019-10-13 18:03:49,665 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 [2019-10-13 18:03:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:49,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:49,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:49,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:49,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480379794] [2019-10-13 18:03:49,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:49,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:49,834 INFO L87 Difference]: Start difference. First operand 744 states and 1117 transitions. Second operand 3 states. [2019-10-13 18:03:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:50,732 INFO L93 Difference]: Finished difference Result 1480 states and 2249 transitions. [2019-10-13 18:03:50,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:50,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-10-13 18:03:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:50,746 INFO L225 Difference]: With dead ends: 1480 [2019-10-13 18:03:50,747 INFO L226 Difference]: Without dead ends: 1478 [2019-10-13 18:03:50,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-10-13 18:03:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 930. [2019-10-13 18:03:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-10-13 18:03:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1428 transitions. [2019-10-13 18:03:50,785 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1428 transitions. Word has length 153 [2019-10-13 18:03:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:50,786 INFO L462 AbstractCegarLoop]: Abstraction has 930 states and 1428 transitions. [2019-10-13 18:03:50,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1428 transitions. [2019-10-13 18:03:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 18:03:50,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:50,791 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:50,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1417529771, now seen corresponding path program 1 times [2019-10-13 18:03:50,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:50,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062604973] [2019-10-13 18:03:50,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:51,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062604973] [2019-10-13 18:03:51,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441072184] [2019-10-13 18:03:51,804 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 [2019-10-13 18:03:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:51,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:51,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 18:03:52,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:52,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:03:52,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340657260] [2019-10-13 18:03:52,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:52,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:52,048 INFO L87 Difference]: Start difference. First operand 930 states and 1428 transitions. Second operand 5 states. [2019-10-13 18:03:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:53,361 INFO L93 Difference]: Finished difference Result 2064 states and 3140 transitions. [2019-10-13 18:03:53,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:53,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2019-10-13 18:03:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:53,368 INFO L225 Difference]: With dead ends: 2064 [2019-10-13 18:03:53,368 INFO L226 Difference]: Without dead ends: 1140 [2019-10-13 18:03:53,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:03:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2019-10-13 18:03:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 942. [2019-10-13 18:03:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-13 18:03:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1355 transitions. [2019-10-13 18:03:53,411 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1355 transitions. Word has length 218 [2019-10-13 18:03:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:53,411 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1355 transitions. [2019-10-13 18:03:53,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1355 transitions. [2019-10-13 18:03:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-10-13 18:03:53,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:53,419 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:53,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:53,632 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -214589256, now seen corresponding path program 1 times [2019-10-13 18:03:53,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:53,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164003824] [2019-10-13 18:03:53,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:53,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:53,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 39 proven. 130 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:03:53,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164003824] [2019-10-13 18:03:53,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389475781] [2019-10-13 18:03:53,923 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 [2019-10-13 18:03:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:54,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 18:03:54,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:54,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:03:54,135 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439861015] [2019-10-13 18:03:54,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:54,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:54,137 INFO L87 Difference]: Start difference. First operand 942 states and 1355 transitions. Second operand 5 states. [2019-10-13 18:03:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:55,286 INFO L93 Difference]: Finished difference Result 2282 states and 3428 transitions. [2019-10-13 18:03:55,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:55,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 288 [2019-10-13 18:03:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:55,298 INFO L225 Difference]: With dead ends: 2282 [2019-10-13 18:03:55,299 INFO L226 Difference]: Without dead ends: 1346 [2019-10-13 18:03:55,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2019-10-13 18:03:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1322. [2019-10-13 18:03:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2019-10-13 18:03:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1815 transitions. [2019-10-13 18:03:55,351 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1815 transitions. Word has length 288 [2019-10-13 18:03:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:55,352 INFO L462 AbstractCegarLoop]: Abstraction has 1322 states and 1815 transitions. [2019-10-13 18:03:55,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1815 transitions. [2019-10-13 18:03:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-10-13 18:03:55,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:55,369 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:55,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:55,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1188860996, now seen corresponding path program 1 times [2019-10-13 18:03:55,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:55,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116308420] [2019-10-13 18:03:55,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:55,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:55,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 49 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:56,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116308420] [2019-10-13 18:03:56,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184670218] [2019-10-13 18:03:56,697 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 [2019-10-13 18:03:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:56,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:56,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 18:03:57,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:57,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:57,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183128612] [2019-10-13 18:03:57,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:57,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:57,057 INFO L87 Difference]: Start difference. First operand 1322 states and 1815 transitions. Second operand 16 states. [2019-10-13 18:04:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:01,556 INFO L93 Difference]: Finished difference Result 2951 states and 4024 transitions. [2019-10-13 18:04:01,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:04:01,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 302 [2019-10-13 18:04:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:01,564 INFO L225 Difference]: With dead ends: 2951 [2019-10-13 18:04:01,564 INFO L226 Difference]: Without dead ends: 1588 [2019-10-13 18:04:01,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:04:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2019-10-13 18:04:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1510. [2019-10-13 18:04:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1510 states. [2019-10-13 18:04:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1843 transitions. [2019-10-13 18:04:01,608 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1843 transitions. Word has length 302 [2019-10-13 18:04:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:01,608 INFO L462 AbstractCegarLoop]: Abstraction has 1510 states and 1843 transitions. [2019-10-13 18:04:01,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:04:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1843 transitions. [2019-10-13 18:04:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-10-13 18:04:01,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:01,615 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:04:01,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:01,827 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 926488527, now seen corresponding path program 1 times [2019-10-13 18:04:01,827 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:01,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898639200] [2019-10-13 18:04:01,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:01,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,352 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-10-13 18:04:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 207 proven. 8 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 18:04:02,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898639200] [2019-10-13 18:04:02,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161618999] [2019-10-13 18:04:02,851 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 [2019-10-13 18:04:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:04:02,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:02,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 18:04:03,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:03,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-13 18:04:03,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430847476] [2019-10-13 18:04:03,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:03,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:04:03,113 INFO L87 Difference]: Start difference. First operand 1510 states and 1843 transitions. Second operand 5 states. [2019-10-13 18:04:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:04,127 INFO L93 Difference]: Finished difference Result 4160 states and 5151 transitions. [2019-10-13 18:04:04,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:04:04,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2019-10-13 18:04:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:04,138 INFO L225 Difference]: With dead ends: 4160 [2019-10-13 18:04:04,138 INFO L226 Difference]: Without dead ends: 2656 [2019-10-13 18:04:04,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 330 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:04:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-13 18:04:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2646. [2019-10-13 18:04:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2646 states. [2019-10-13 18:04:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3209 transitions. [2019-10-13 18:04:04,207 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3209 transitions. Word has length 327 [2019-10-13 18:04:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:04,208 INFO L462 AbstractCegarLoop]: Abstraction has 2646 states and 3209 transitions. [2019-10-13 18:04:04,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3209 transitions. [2019-10-13 18:04:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-10-13 18:04:04,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:04,218 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:04,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:04,422 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:04,422 INFO L82 PathProgramCache]: Analyzing trace with hash 940260124, now seen corresponding path program 1 times [2019-10-13 18:04:04,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:04,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022537734] [2019-10-13 18:04:04,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-13 18:04:05,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022537734] [2019-10-13 18:04:05,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750177323] [2019-10-13 18:04:05,113 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 [2019-10-13 18:04:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:05,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:05,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:04:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:04:05,410 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:05,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:04:05,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093313850] [2019-10-13 18:04:05,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:04:05,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:04:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:05,412 INFO L87 Difference]: Start difference. First operand 2646 states and 3209 transitions. Second operand 11 states. [2019-10-13 18:04:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:07,904 INFO L93 Difference]: Finished difference Result 6408 states and 8042 transitions. [2019-10-13 18:04:07,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 18:04:07,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 437 [2019-10-13 18:04:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:07,920 INFO L225 Difference]: With dead ends: 6408 [2019-10-13 18:04:07,921 INFO L226 Difference]: Without dead ends: 3950 [2019-10-13 18:04:07,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 454 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:04:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2019-10-13 18:04:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3946. [2019-10-13 18:04:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2019-10-13 18:04:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4874 transitions. [2019-10-13 18:04:08,013 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4874 transitions. Word has length 437 [2019-10-13 18:04:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:08,014 INFO L462 AbstractCegarLoop]: Abstraction has 3946 states and 4874 transitions. [2019-10-13 18:04:08,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:04:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4874 transitions. [2019-10-13 18:04:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2019-10-13 18:04:08,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:08,024 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:04:08,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:08,232 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1434354200, now seen corresponding path program 1 times [2019-10-13 18:04:08,232 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:08,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532876380] [2019-10-13 18:04:08,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:08,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:08,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 164 proven. 310 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-13 18:04:09,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532876380] [2019-10-13 18:04:09,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005652709] [2019-10-13 18:04:09,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:09,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:04:09,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 516 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-13 18:04:09,523 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:09,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-13 18:04:09,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65403002] [2019-10-13 18:04:09,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:04:09,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:04:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:04:09,528 INFO L87 Difference]: Start difference. First operand 3946 states and 4874 transitions. Second operand 13 states. [2019-10-13 18:04:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:13,324 INFO L93 Difference]: Finished difference Result 9204 states and 11444 transitions. [2019-10-13 18:04:13,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 18:04:13,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 455 [2019-10-13 18:04:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:13,342 INFO L225 Difference]: With dead ends: 9204 [2019-10-13 18:04:13,342 INFO L226 Difference]: Without dead ends: 5448 [2019-10-13 18:04:13,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 484 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 18:04:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2019-10-13 18:04:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5056. [2019-10-13 18:04:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5056 states. [2019-10-13 18:04:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 6009 transitions. [2019-10-13 18:04:13,463 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 6009 transitions. Word has length 455 [2019-10-13 18:04:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:13,464 INFO L462 AbstractCegarLoop]: Abstraction has 5056 states and 6009 transitions. [2019-10-13 18:04:13,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:04:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 6009 transitions. [2019-10-13 18:04:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2019-10-13 18:04:13,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:13,477 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-10-13 18:04:13,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:13,689 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1368279615, now seen corresponding path program 1 times [2019-10-13 18:04:13,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:13,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982363294] [2019-10-13 18:04:13,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:13,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:13,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 383 proven. 93 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2019-10-13 18:04:15,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982363294] [2019-10-13 18:04:15,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750734368] [2019-10-13 18:04:15,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:15,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:04:15,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:15,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 700 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2019-10-13 18:04:15,618 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:15,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:04:15,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474162505] [2019-10-13 18:04:15,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:04:15,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:04:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:04:15,620 INFO L87 Difference]: Start difference. First operand 5056 states and 6009 transitions. Second operand 12 states.