java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:09,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:09,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:09,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:09,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:09,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:09,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:09,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:09,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:09,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:09,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:09,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:09,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:09,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:09,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:09,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:09,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:09,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:09,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:09,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:09,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:09,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:09,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:09,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:09,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:59:09,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:59:09,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:59:09,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:59:09,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:59:09,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:59:09,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:59:09,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:59:09,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:59:09,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:09,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:09,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:09,664 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 17:59:09,680 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:09,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:09,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:09,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:09,682 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:09,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:09,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:09,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:09,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:09,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:09,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:09,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:09,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:09,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:09,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:09,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:09,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:09,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:09,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:09,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:09,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:09,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:09,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:09,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:09,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:09,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:09,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:09,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:09,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:09,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:09,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:09,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:09,991 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:09,991 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:09,992 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-13 17:59:10,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76efe7f4/40bd53a0b56f4cfcaddd4d7113aec9b1/FLAG5aeb2dbc6 [2019-10-13 17:59:10,653 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:10,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58.c [2019-10-13 17:59:10,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76efe7f4/40bd53a0b56f4cfcaddd4d7113aec9b1/FLAG5aeb2dbc6 [2019-10-13 17:59:10,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76efe7f4/40bd53a0b56f4cfcaddd4d7113aec9b1 [2019-10-13 17:59:10,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:10,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:10,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:10,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:10,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:10,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:10" (1/1) ... [2019-10-13 17:59:10,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7142d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:10, skipping insertion in model container [2019-10-13 17:59:10,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:10" (1/1) ... [2019-10-13 17:59:10,954 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:11,021 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:11,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:11,593 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:11,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:11,731 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:11,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11 WrapperNode [2019-10-13 17:59:11,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:11,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:11,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:11,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:11,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (1/1) ... [2019-10-13 17:59:11,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:11,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:11,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:11,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:11,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (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 17:59:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:11,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:13,217 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:13,217 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:13,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:13 BoogieIcfgContainer [2019-10-13 17:59:13,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:13,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:13,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:13,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:10" (1/3) ... [2019-10-13 17:59:13,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:13, skipping insertion in model container [2019-10-13 17:59:13,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:11" (2/3) ... [2019-10-13 17:59:13,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:13, skipping insertion in model container [2019-10-13 17:59:13,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:13" (3/3) ... [2019-10-13 17:59:13,228 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label58.c [2019-10-13 17:59:13,238 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:13,248 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:13,260 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:13,287 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:13,288 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:13,288 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:13,288 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:13,289 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:13,289 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:13,289 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:13,289 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:59:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:59:13,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:13,332 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:13,333 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1079521594, now seen corresponding path program 1 times [2019-10-13 17:59:13,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:13,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740813337] [2019-10-13 17:59:13,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:13,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:13,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:13,601 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 17:59:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740813337] [2019-10-13 17:59:13,603 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:13,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:13,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036523949] [2019-10-13 17:59:13,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:13,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:13,626 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:59:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:15,761 INFO L93 Difference]: Finished difference Result 745 states and 1315 transitions. [2019-10-13 17:59:15,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:15,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-13 17:59:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:15,782 INFO L225 Difference]: With dead ends: 745 [2019-10-13 17:59:15,782 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:59:15,791 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 17:59:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:59:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-13 17:59:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-13 17:59:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 640 transitions. [2019-10-13 17:59:15,928 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 640 transitions. Word has length 19 [2019-10-13 17:59:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:15,929 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 640 transitions. [2019-10-13 17:59:15,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 640 transitions. [2019-10-13 17:59:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 17:59:15,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:15,935 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:15,936 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1696713450, now seen corresponding path program 1 times [2019-10-13 17:59:15,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:15,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259423782] [2019-10-13 17:59:15,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:15,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:15,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:16,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259423782] [2019-10-13 17:59:16,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:16,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:16,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273882702] [2019-10-13 17:59:16,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:16,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:16,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:16,348 INFO L87 Difference]: Start difference. First operand 443 states and 640 transitions. Second operand 9 states. [2019-10-13 17:59:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:18,400 INFO L93 Difference]: Finished difference Result 1786 states and 2735 transitions. [2019-10-13 17:59:18,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:59:18,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2019-10-13 17:59:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:18,413 INFO L225 Difference]: With dead ends: 1786 [2019-10-13 17:59:18,413 INFO L226 Difference]: Without dead ends: 1349 [2019-10-13 17:59:18,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:59:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-10-13 17:59:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1186. [2019-10-13 17:59:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2019-10-13 17:59:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1682 transitions. [2019-10-13 17:59:18,491 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1682 transitions. Word has length 93 [2019-10-13 17:59:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:18,491 INFO L462 AbstractCegarLoop]: Abstraction has 1186 states and 1682 transitions. [2019-10-13 17:59:18,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1682 transitions. [2019-10-13 17:59:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:59:18,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:18,496 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:18,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -921580439, now seen corresponding path program 1 times [2019-10-13 17:59:18,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:18,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417478286] [2019-10-13 17:59:18,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:18,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:18,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:18,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417478286] [2019-10-13 17:59:18,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263141101] [2019-10-13 17:59:18,699 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 17:59:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:18,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:18,864 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:18,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:18,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384954862] [2019-10-13 17:59:18,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:18,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:18,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:18,875 INFO L87 Difference]: Start difference. First operand 1186 states and 1682 transitions. Second operand 3 states. [2019-10-13 17:59:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:19,512 INFO L93 Difference]: Finished difference Result 2807 states and 4071 transitions. [2019-10-13 17:59:19,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:19,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-13 17:59:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:19,531 INFO L225 Difference]: With dead ends: 2807 [2019-10-13 17:59:19,531 INFO L226 Difference]: Without dead ends: 1627 [2019-10-13 17:59:19,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-13 17:59:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1627. [2019-10-13 17:59:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2019-10-13 17:59:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2303 transitions. [2019-10-13 17:59:19,616 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2303 transitions. Word has length 98 [2019-10-13 17:59:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:19,618 INFO L462 AbstractCegarLoop]: Abstraction has 1627 states and 2303 transitions. [2019-10-13 17:59:19,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2303 transitions. [2019-10-13 17:59:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 17:59:19,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:19,629 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:19,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:19,833 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1133582729, now seen corresponding path program 1 times [2019-10-13 17:59:19,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:19,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331207417] [2019-10-13 17:59:19,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:19,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:19,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:20,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331207417] [2019-10-13 17:59:20,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:20,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:20,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918054446] [2019-10-13 17:59:20,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:20,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:20,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:20,078 INFO L87 Difference]: Start difference. First operand 1627 states and 2303 transitions. Second operand 9 states. [2019-10-13 17:59:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:21,616 INFO L93 Difference]: Finished difference Result 4045 states and 6031 transitions. [2019-10-13 17:59:21,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:59:21,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-13 17:59:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:21,634 INFO L225 Difference]: With dead ends: 4045 [2019-10-13 17:59:21,634 INFO L226 Difference]: Without dead ends: 2424 [2019-10-13 17:59:21,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:59:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2019-10-13 17:59:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1794. [2019-10-13 17:59:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1794 states. [2019-10-13 17:59:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2320 transitions. [2019-10-13 17:59:21,726 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2320 transitions. Word has length 114 [2019-10-13 17:59:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:21,727 INFO L462 AbstractCegarLoop]: Abstraction has 1794 states and 2320 transitions. [2019-10-13 17:59:21,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2320 transitions. [2019-10-13 17:59:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 17:59:21,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:21,731 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:21,731 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1256803409, now seen corresponding path program 1 times [2019-10-13 17:59:21,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:21,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513005151] [2019-10-13 17:59:21,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:21,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:21,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-13 17:59:21,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513005151] [2019-10-13 17:59:21,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821470047] [2019-10-13 17:59:21,974 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 17:59:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:22,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:59:22,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:22,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:22,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106439946] [2019-10-13 17:59:22,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:22,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:22,105 INFO L87 Difference]: Start difference. First operand 1794 states and 2320 transitions. Second operand 3 states. [2019-10-13 17:59:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:22,710 INFO L93 Difference]: Finished difference Result 3882 states and 5082 transitions. [2019-10-13 17:59:22,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:22,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-13 17:59:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:22,725 INFO L225 Difference]: With dead ends: 3882 [2019-10-13 17:59:22,725 INFO L226 Difference]: Without dead ends: 2094 [2019-10-13 17:59:22,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-10-13 17:59:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2019-10-13 17:59:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-13 17:59:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2721 transitions. [2019-10-13 17:59:22,867 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2721 transitions. Word has length 186 [2019-10-13 17:59:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:22,868 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2721 transitions. [2019-10-13 17:59:22,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2721 transitions. [2019-10-13 17:59:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-13 17:59:22,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:22,873 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:23,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:23,077 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash 566553090, now seen corresponding path program 1 times [2019-10-13 17:59:23,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:23,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213479314] [2019-10-13 17:59:23,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:23,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:23,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:23,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213479314] [2019-10-13 17:59:23,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418755957] [2019-10-13 17:59:23,402 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 17:59:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:23,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:23,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:23,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:23,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:59:23,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662851898] [2019-10-13 17:59:23,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:59:23,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:59:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:59:23,655 INFO L87 Difference]: Start difference. First operand 2092 states and 2721 transitions. Second operand 11 states. [2019-10-13 17:59:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:26,204 INFO L93 Difference]: Finished difference Result 4206 states and 5495 transitions. [2019-10-13 17:59:26,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:59:26,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 203 [2019-10-13 17:59:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:26,217 INFO L225 Difference]: With dead ends: 4206 [2019-10-13 17:59:26,217 INFO L226 Difference]: Without dead ends: 2120 [2019-10-13 17:59:26,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:59:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2019-10-13 17:59:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2094. [2019-10-13 17:59:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-10-13 17:59:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2629 transitions. [2019-10-13 17:59:26,277 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2629 transitions. Word has length 203 [2019-10-13 17:59:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:26,278 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2629 transitions. [2019-10-13 17:59:26,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:59:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2629 transitions. [2019-10-13 17:59:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-13 17:59:26,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:26,283 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:26,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:26,488 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 405320705, now seen corresponding path program 1 times [2019-10-13 17:59:26,490 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:26,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022163090] [2019-10-13 17:59:26,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:26,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:26,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:26,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022163090] [2019-10-13 17:59:26,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875536311] [2019-10-13 17:59:26,780 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 17:59:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:26,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:26,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:26,937 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:26,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:59:26,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092954494] [2019-10-13 17:59:26,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:59:26,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:26,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:59:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:59:26,939 INFO L87 Difference]: Start difference. First operand 2094 states and 2629 transitions. Second operand 11 states. [2019-10-13 17:59:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:29,587 INFO L93 Difference]: Finished difference Result 4379 states and 5549 transitions. [2019-10-13 17:59:29,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:59:29,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 210 [2019-10-13 17:59:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:29,602 INFO L225 Difference]: With dead ends: 4379 [2019-10-13 17:59:29,603 INFO L226 Difference]: Without dead ends: 2291 [2019-10-13 17:59:29,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:59:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2019-10-13 17:59:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1961. [2019-10-13 17:59:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2019-10-13 17:59:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2362 transitions. [2019-10-13 17:59:29,677 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2362 transitions. Word has length 210 [2019-10-13 17:59:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:29,678 INFO L462 AbstractCegarLoop]: Abstraction has 1961 states and 2362 transitions. [2019-10-13 17:59:29,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:59:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2362 transitions. [2019-10-13 17:59:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 17:59:29,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:29,683 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:29,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:29,896 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash -908083558, now seen corresponding path program 1 times [2019-10-13 17:59:29,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:29,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274175349] [2019-10-13 17:59:29,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:29,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:29,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:30,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274175349] [2019-10-13 17:59:30,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099553109] [2019-10-13 17:59:30,193 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 17:59:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:30,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:30,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:30,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:30,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-13 17:59:30,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561518315] [2019-10-13 17:59:30,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:59:30,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:59:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:30,359 INFO L87 Difference]: Start difference. First operand 1961 states and 2362 transitions. Second operand 13 states. [2019-10-13 17:59:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:34,033 INFO L93 Difference]: Finished difference Result 6083 states and 7281 transitions. [2019-10-13 17:59:34,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:59:34,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2019-10-13 17:59:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:34,044 INFO L225 Difference]: With dead ends: 6083 [2019-10-13 17:59:34,045 INFO L226 Difference]: Without dead ends: 2664 [2019-10-13 17:59:34,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:59:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2019-10-13 17:59:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1937. [2019-10-13 17:59:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-10-13 17:59:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2150 transitions. [2019-10-13 17:59:34,111 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2150 transitions. Word has length 219 [2019-10-13 17:59:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:34,112 INFO L462 AbstractCegarLoop]: Abstraction has 1937 states and 2150 transitions. [2019-10-13 17:59:34,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:59:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2150 transitions. [2019-10-13 17:59:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-13 17:59:34,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:34,118 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:34,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:34,325 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -836157958, now seen corresponding path program 1 times [2019-10-13 17:59:34,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:34,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432039885] [2019-10-13 17:59:34,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:34,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:34,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-13 17:59:34,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432039885] [2019-10-13 17:59:34,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998117531] [2019-10-13 17:59:34,784 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 17:59:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:34,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:59:34,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:35,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:35,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:37,166 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2019-10-13 17:59:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:37,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:37,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-13 17:59:37,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391020782] [2019-10-13 17:59:37,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:59:37,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:59:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:37,350 INFO L87 Difference]: Start difference. First operand 1937 states and 2150 transitions. Second operand 17 states. [2019-10-13 17:59:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:45,559 INFO L93 Difference]: Finished difference Result 6989 states and 7970 transitions. [2019-10-13 17:59:45,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:59:45,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 275 [2019-10-13 17:59:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:45,582 INFO L225 Difference]: With dead ends: 6989 [2019-10-13 17:59:45,582 INFO L226 Difference]: Without dead ends: 4909 [2019-10-13 17:59:45,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:59:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2019-10-13 17:59:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3411. [2019-10-13 17:59:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3411 states. [2019-10-13 17:59:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 3816 transitions. [2019-10-13 17:59:45,690 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 3816 transitions. Word has length 275 [2019-10-13 17:59:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:45,690 INFO L462 AbstractCegarLoop]: Abstraction has 3411 states and 3816 transitions. [2019-10-13 17:59:45,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:59:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 3816 transitions. [2019-10-13 17:59:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-13 17:59:45,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:45,701 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:45,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:45,906 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash 671143510, now seen corresponding path program 1 times [2019-10-13 17:59:45,906 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:45,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117263309] [2019-10-13 17:59:45,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:45,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:45,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 44 proven. 279 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:59:46,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117263309] [2019-10-13 17:59:46,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27076672] [2019-10-13 17:59:46,691 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 17:59:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:46,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:59:46,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:46,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:46,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms