java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:38,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:38,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:38,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:38,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:38,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:38,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:38,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:38,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:38,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:38,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:38,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:38,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:38,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:38,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:38,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:38,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:38,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:38,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:38,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:38,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:38,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:38,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:38,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:38,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:38,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:38,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:38,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:38,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:38,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:38,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:38,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:38,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:38,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:38,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:38,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:38,693 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 18:03:38,716 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:38,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:38,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:38,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:38,720 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:38,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:38,720 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:38,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:38,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:38,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:38,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:38,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:38,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:38,723 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:38,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:38,723 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:38,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:38,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:38,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:38,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:38,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:38,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:38,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:38,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:38,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:38,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:38,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:38,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:38,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:38,988 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:39,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:39,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:39,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:39,009 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:39,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-13 18:03:39,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56fd3013/b31579dc860a448584923cc65697a92b/FLAG2a14ea100 [2019-10-13 18:03:39,712 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:39,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-13 18:03:39,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56fd3013/b31579dc860a448584923cc65697a92b/FLAG2a14ea100 [2019-10-13 18:03:39,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c56fd3013/b31579dc860a448584923cc65697a92b [2019-10-13 18:03:39,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:39,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:39,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:39,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:39,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:39,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:39" (1/1) ... [2019-10-13 18:03:39,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceb8032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:39, skipping insertion in model container [2019-10-13 18:03:39,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:39" (1/1) ... [2019-10-13 18:03:39,979 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:40,055 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:40,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:40,619 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:40,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:40,765 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:40,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40 WrapperNode [2019-10-13 18:03:40,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:40,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:40,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:40,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:40,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (1/1) ... [2019-10-13 18:03:40,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:40,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:40,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:40,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:40,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (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 18:03:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:41,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:41,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:41,009 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:41,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:41,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:41,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:42,649 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:42,649 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:42,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:42 BoogieIcfgContainer [2019-10-13 18:03:42,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:42,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:42,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:42,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:42,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:39" (1/3) ... [2019-10-13 18:03:42,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcc3043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:42, skipping insertion in model container [2019-10-13 18:03:42,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:40" (2/3) ... [2019-10-13 18:03:42,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcc3043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:42, skipping insertion in model container [2019-10-13 18:03:42,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:42" (3/3) ... [2019-10-13 18:03:42,670 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label57.c [2019-10-13 18:03:42,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:42,692 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:42,704 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:42,746 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:42,746 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:42,746 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:42,746 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:42,747 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:42,747 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:42,747 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:42,747 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 18:03:42,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:42,793 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:42,795 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1500027043, now seen corresponding path program 1 times [2019-10-13 18:03:42,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:42,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412132659] [2019-10-13 18:03:42,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:43,138 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 18:03:43,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412132659] [2019-10-13 18:03:43,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:43,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:43,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705763497] [2019-10-13 18:03:43,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:43,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:43,164 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:45,853 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:03:45,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:45,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-13 18:03:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:45,878 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:03:45,878 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:45,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:03:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:03:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:03:46,010 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 36 [2019-10-13 18:03:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:46,011 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:03:46,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:03:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 18:03:46,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:46,029 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:46,029 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1488834266, now seen corresponding path program 1 times [2019-10-13 18:03:46,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:46,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585814382] [2019-10-13 18:03:46,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:46,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585814382] [2019-10-13 18:03:46,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:46,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:46,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115752863] [2019-10-13 18:03:46,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:46,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:46,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:46,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:46,443 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:03:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:48,381 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:03:48,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:48,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-10-13 18:03:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:48,390 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:03:48,391 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:03:48,393 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 [2019-10-13 18:03:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:03:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:03:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:03:48,429 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 122 [2019-10-13 18:03:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:48,430 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:03:48,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:03:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 18:03:48,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:48,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:48,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash -753448615, now seen corresponding path program 1 times [2019-10-13 18:03:48,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:48,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772242640] [2019-10-13 18:03:48,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:48,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772242640] [2019-10-13 18:03:48,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144723582] [2019-10-13 18:03:48,656 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 18:03:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:48,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:48,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:48,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:48,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467322749] [2019-10-13 18:03:48,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:48,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:48,899 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:03:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:49,800 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-13 18:03:49,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:49,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-10-13 18:03:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:49,809 INFO L225 Difference]: With dead ends: 1680 [2019-10-13 18:03:49,810 INFO L226 Difference]: Without dead ends: 1120 [2019-10-13 18:03:49,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-13 18:03:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-13 18:03:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-13 18:03:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-13 18:03:49,851 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 131 [2019-10-13 18:03:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:49,852 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-13 18:03:49,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-13 18:03:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:03:49,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:49,856 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:50,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,071 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash 89446293, now seen corresponding path program 1 times [2019-10-13 18:03:50,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:50,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962069315] [2019-10-13 18:03:50,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:50,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962069315] [2019-10-13 18:03:50,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819427345] [2019-10-13 18:03:50,408 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 18:03:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:50,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:50,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:50,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:50,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:50,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683631867] [2019-10-13 18:03:50,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:50,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:50,600 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-13 18:03:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:51,507 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-13 18:03:51,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:51,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-13 18:03:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:51,516 INFO L225 Difference]: With dead ends: 2414 [2019-10-13 18:03:51,516 INFO L226 Difference]: Without dead ends: 1486 [2019-10-13 18:03:51,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-13 18:03:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-13 18:03:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-13 18:03:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-13 18:03:51,565 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 234 [2019-10-13 18:03:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:51,566 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-13 18:03:51,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-13 18:03:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-13 18:03:51,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:51,573 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:51,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:51,788 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash -5420906, now seen corresponding path program 1 times [2019-10-13 18:03:51,790 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:51,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513747446] [2019-10-13 18:03:51,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:51,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:51,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-13 18:03:52,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513747446] [2019-10-13 18:03:52,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92394701] [2019-10-13 18:03:52,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:03:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:52,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:03:52,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:52,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 18:03:52,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978172064] [2019-10-13 18:03:52,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:52,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:52,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:52,340 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-13 18:03:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:53,132 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-13 18:03:53,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:53,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2019-10-13 18:03:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:53,150 INFO L225 Difference]: With dead ends: 3156 [2019-10-13 18:03:53,150 INFO L226 Difference]: Without dead ends: 1858 [2019-10-13 18:03:53,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-13 18:03:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-13 18:03:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-13 18:03:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-13 18:03:53,225 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 253 [2019-10-13 18:03:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:53,230 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-13 18:03:53,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-13 18:03:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 18:03:53,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:53,236 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:53,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:53,440 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1175360854, now seen corresponding path program 1 times [2019-10-13 18:03:53,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:53,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867005921] [2019-10-13 18:03:53,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:53,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:53,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:53,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867005921] [2019-10-13 18:03:53,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408776365] [2019-10-13 18:03:53,878 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 18:03:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:54,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:54,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:54,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 18:03:54,306 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:54,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-10-13 18:03:54,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553620679] [2019-10-13 18:03:54,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:54,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:54,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:54,309 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-13 18:03:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:55,790 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-13 18:03:55,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:55,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-13 18:03:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:55,803 INFO L225 Difference]: With dead ends: 3930 [2019-10-13 18:03:55,803 INFO L226 Difference]: Without dead ends: 2262 [2019-10-13 18:03:55,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-13 18:03:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-13 18:03:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-13 18:03:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-13 18:03:55,880 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 259 [2019-10-13 18:03:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:55,880 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-13 18:03:55,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-13 18:03:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-13 18:03:55,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:55,888 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:56,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:56,100 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash -518867421, now seen corresponding path program 1 times [2019-10-13 18:03:56,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:56,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152241510] [2019-10-13 18:03:56,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:56,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:56,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 97 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:57,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152241510] [2019-10-13 18:03:57,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69613290] [2019-10-13 18:03:57,273 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 18:03:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:57,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:57,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:57,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 283 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 18:03:57,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:57,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:57,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502929472] [2019-10-13 18:03:57,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:57,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:57,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:57,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:57,730 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-13 18:04:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:01,710 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-13 18:04:01,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:04:01,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 343 [2019-10-13 18:04:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:01,726 INFO L225 Difference]: With dead ends: 4460 [2019-10-13 18:04:01,726 INFO L226 Difference]: Without dead ends: 2349 [2019-10-13 18:04:01,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:04:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-13 18:04:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-13 18:04:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-13 18:04:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-13 18:04:01,805 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 343 [2019-10-13 18:04:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:01,805 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-13 18:04:01,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:04:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-13 18:04:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-13 18:04:01,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:01,815 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:02,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:02,027 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1390438032, now seen corresponding path program 1 times [2019-10-13 18:04:02,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:02,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56172290] [2019-10-13 18:04:02,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:02,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:02,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 165 proven. 146 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 18:04:02,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56172290] [2019-10-13 18:04:02,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797803961] [2019-10-13 18:04:02,929 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 18:04:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:03,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:04:03,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:03,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-13 18:04:03,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:03,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:04:03,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042927115] [2019-10-13 18:04:03,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:03,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:04:03,188 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-13 18:04:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:04,305 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-13 18:04:04,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:04:04,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2019-10-13 18:04:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:04,321 INFO L225 Difference]: With dead ends: 5098 [2019-10-13 18:04:04,321 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 18:04:04,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:04:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 18:04:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-13 18:04:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-13 18:04:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-13 18:04:04,406 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 368 [2019-10-13 18:04:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:04,407 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-13 18:04:04,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-13 18:04:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2019-10-13 18:04:04,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:04,419 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:04,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:04,629 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1446760509, now seen corresponding path program 1 times [2019-10-13 18:04:04,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:04,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797858453] [2019-10-13 18:04:04,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:04:05,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797858453] [2019-10-13 18:04:05,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939548150] [2019-10-13 18:04:05,371 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 18:04:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:05,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:04:05,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-13 18:04:05,634 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:05,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:04:05,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556533712] [2019-10-13 18:04:05,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:04:05,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:05,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:04:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:04:05,636 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-13 18:04:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:07,638 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-13 18:04:07,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:04:07,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 478 [2019-10-13 18:04:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:07,651 INFO L225 Difference]: With dead ends: 5490 [2019-10-13 18:04:07,651 INFO L226 Difference]: Without dead ends: 2846 [2019-10-13 18:04:07,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-13 18:04:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-13 18:04:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-13 18:04:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-13 18:04:07,719 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 478 [2019-10-13 18:04:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:07,720 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-13 18:04:07,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:04:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-13 18:04:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-10-13 18:04:07,734 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:07,734 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:07,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:07,939 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 171945148, now seen corresponding path program 1 times [2019-10-13 18:04:07,940 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:07,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301546882] [2019-10-13 18:04:07,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 463 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:04:09,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301546882] [2019-10-13 18:04:09,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181019337] [2019-10-13 18:04:09,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:04:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:09,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:04:09,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:09,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 836 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-13 18:04:10,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:10,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:04:10,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305744358] [2019-10-13 18:04:10,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:04:10,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:04:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:04:10,381 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-13 18:04:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:12,516 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-13 18:04:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:12,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 562 [2019-10-13 18:04:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:12,529 INFO L225 Difference]: With dead ends: 5780 [2019-10-13 18:04:12,529 INFO L226 Difference]: Without dead ends: 3085 [2019-10-13 18:04:12,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:04:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-13 18:04:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-13 18:04:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 18:04:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-13 18:04:12,601 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 562 [2019-10-13 18:04:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:12,602 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-13 18:04:12,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:04:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-13 18:04:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2019-10-13 18:04:12,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:12,610 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:12,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:12,815 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash 726916816, now seen corresponding path program 2 times [2019-10-13 18:04:12,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:12,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264268456] [2019-10-13 18:04:12,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:12,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:12,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 686 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-13 18:04:13,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264268456] [2019-10-13 18:04:13,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786347466] [2019-10-13 18:04:13,997 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:14,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:04:14,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:04:14,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:04:14,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:14,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:04:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 888 proven. 2 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2019-10-13 18:04:14,485 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:14,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:04:14,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990624189] [2019-10-13 18:04:14,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:04:14,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:04:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:04:14,487 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.