/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:48:37,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:48:37,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:48:37,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:48:37,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:48:37,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:48:37,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:48:37,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:48:37,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:48:37,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:48:37,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:48:37,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:48:37,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:48:37,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:48:37,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:48:37,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:48:37,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:48:37,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:48:37,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:48:37,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:48:37,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:48:37,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:48:37,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:48:37,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:48:37,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:48:37,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:48:37,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:48:37,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:48:37,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:48:37,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:48:37,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:48:37,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:48:37,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:48:37,731 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:48:37,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:48:37,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:48:37,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:48:37,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:48:37,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:48:37,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:48:37,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:48:37,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:48:37,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:48:37,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:48:37,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:48:37,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:48:37,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:48:37,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:48:37,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:48:37,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:48:37,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:48:37,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:48:37,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:48:37,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:48:38,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:48:38,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:48:38,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:48:38,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:48:38,041 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:48:38,042 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-21 15:48:38,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98cf3ad75/5c69e7a284d247129a625e43d4fb1fed/FLAGb4d948a9e [2020-08-21 15:48:38,726 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:48:38,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-21 15:48:38,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98cf3ad75/5c69e7a284d247129a625e43d4fb1fed/FLAGb4d948a9e [2020-08-21 15:48:38,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98cf3ad75/5c69e7a284d247129a625e43d4fb1fed [2020-08-21 15:48:38,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:48:38,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:48:38,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:48:38,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:48:38,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:48:38,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:48:38" (1/1) ... [2020-08-21 15:48:38,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347c51ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:38, skipping insertion in model container [2020-08-21 15:48:38,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:48:38" (1/1) ... [2020-08-21 15:48:38,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:48:39,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:48:39,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:48:39,625 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:48:39,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:48:39,759 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:48:39,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39 WrapperNode [2020-08-21 15:48:39,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:48:39,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:48:39,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:48:39,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:48:39,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... [2020-08-21 15:48:39,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:48:39,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:48:39,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:48:39,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:48:39,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 15:48:40,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:48:40,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:48:40,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-21 15:48:40,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:48:40,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-21 15:48:40,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:48:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:48:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 15:48:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:48:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:48:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:48:41,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:48:41,496 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:48:41,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:48:41 BoogieIcfgContainer [2020-08-21 15:48:41,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:48:41,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:48:41,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:48:41,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:48:41,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:48:38" (1/3) ... [2020-08-21 15:48:41,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cab8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:48:41, skipping insertion in model container [2020-08-21 15:48:41,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:48:39" (2/3) ... [2020-08-21 15:48:41,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cab8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:48:41, skipping insertion in model container [2020-08-21 15:48:41,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:48:41" (3/3) ... [2020-08-21 15:48:41,525 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-08-21 15:48:41,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:48:41,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:48:41,565 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:48:41,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:48:41,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:48:41,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:48:41,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:48:41,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:48:41,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:48:41,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:48:41,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:48:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-21 15:48:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 15:48:41,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:41,655 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:48:41,655 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash 406410443, now seen corresponding path program 1 times [2020-08-21 15:48:41,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:41,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853723893] [2020-08-21 15:48:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:48:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853723893] [2020-08-21 15:48:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:48:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:48:42,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710836636] [2020-08-21 15:48:42,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:48:42,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:48:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:48:42,162 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-21 15:48:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:48:44,947 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-21 15:48:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:48:44,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-21 15:48:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:48:44,972 INFO L225 Difference]: With dead ends: 886 [2020-08-21 15:48:44,972 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 15:48:44,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:48:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 15:48:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-21 15:48:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-21 15:48:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-21 15:48:45,077 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 54 [2020-08-21 15:48:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:48:45,078 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-21 15:48:45,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:48:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-21 15:48:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 15:48:45,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:45,090 INFO L422 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, 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] [2020-08-21 15:48:45,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:48:45,091 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash -724645666, now seen corresponding path program 1 times [2020-08-21 15:48:45,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:45,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212789022] [2020-08-21 15:48:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:45,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:45,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:48:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:48:45,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212789022] [2020-08-21 15:48:45,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:48:45,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:48:45,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613297493] [2020-08-21 15:48:45,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:48:45,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:48:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:48:45,423 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-21 15:48:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:48:47,479 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-21 15:48:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:48:47,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-08-21 15:48:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:48:47,490 INFO L225 Difference]: With dead ends: 1518 [2020-08-21 15:48:47,490 INFO L226 Difference]: Without dead ends: 964 [2020-08-21 15:48:47,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:48:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-21 15:48:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-21 15:48:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-21 15:48:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-21 15:48:47,558 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 148 [2020-08-21 15:48:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:48:47,559 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-21 15:48:47,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:48:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-21 15:48:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-21 15:48:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:47,567 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:48:47,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:48:47,567 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:47,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240930, now seen corresponding path program 1 times [2020-08-21 15:48:47,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:47,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759940186] [2020-08-21 15:48:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:47,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:47,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:48:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:48:47,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759940186] [2020-08-21 15:48:47,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:48:47,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:48:47,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608416178] [2020-08-21 15:48:47,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:48:47,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:48:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:48:47,986 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-21 15:48:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:48:50,004 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-21 15:48:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:48:50,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-08-21 15:48:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:48:50,028 INFO L225 Difference]: With dead ends: 2490 [2020-08-21 15:48:50,029 INFO L226 Difference]: Without dead ends: 1552 [2020-08-21 15:48:50,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:48:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-21 15:48:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-21 15:48:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-21 15:48:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-21 15:48:50,124 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 194 [2020-08-21 15:48:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:48:50,125 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-21 15:48:50,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:48:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-21 15:48:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-21 15:48:50,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:50,140 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:48:50,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:48:50,140 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1200176176, now seen corresponding path program 1 times [2020-08-21 15:48:50,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:50,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554898939] [2020-08-21 15:48:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:50,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:48:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:50,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 15:48:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 94 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 15:48:50,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554898939] [2020-08-21 15:48:50,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:48:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:48:50,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185749283] [2020-08-21 15:48:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:48:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:48:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:48:50,553 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-21 15:48:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:48:52,762 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-21 15:48:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:48:52,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 213 [2020-08-21 15:48:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:48:52,772 INFO L225 Difference]: With dead ends: 3412 [2020-08-21 15:48:52,772 INFO L226 Difference]: Without dead ends: 1900 [2020-08-21 15:48:52,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:48:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-21 15:48:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-21 15:48:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-21 15:48:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-21 15:48:52,830 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 213 [2020-08-21 15:48:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:48:52,831 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-21 15:48:52,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:48:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-21 15:48:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-21 15:48:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:52,837 INFO L422 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:48:52,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:48:52,837 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:52,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1683146711, now seen corresponding path program 1 times [2020-08-21 15:48:52,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:52,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488415147] [2020-08-21 15:48:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:52,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:48:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:53,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 15:48:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:53,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-21 15:48:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 175 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 15:48:53,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488415147] [2020-08-21 15:48:53,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:48:53,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:48:53,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135954027] [2020-08-21 15:48:53,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:48:53,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:48:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:48:53,379 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-21 15:48:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:48:56,136 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-21 15:48:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 15:48:56,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2020-08-21 15:48:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:48:56,148 INFO L225 Difference]: With dead ends: 3677 [2020-08-21 15:48:56,149 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 15:48:56,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-21 15:48:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 15:48:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-21 15:48:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-21 15:48:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-21 15:48:56,208 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 297 [2020-08-21 15:48:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:48:56,209 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-21 15:48:56,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:48:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-21 15:48:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-08-21 15:48:56,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:48:56,219 INFO L422 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:48:56,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:48:56,220 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:48:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:48:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1242283415, now seen corresponding path program 1 times [2020-08-21 15:48:56,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:48:56,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357853447] [2020-08-21 15:48:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:48:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:48:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:48:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:48:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:48:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-21 15:48:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:48:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 414 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-21 15:48:56,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357853447] [2020-08-21 15:48:56,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:48:56,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:48:56,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985442723] [2020-08-21 15:48:56,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:48:57,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:48:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:48:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:48:57,002 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-21 15:49:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:01,674 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-21 15:49:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 15:49:01,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2020-08-21 15:49:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:01,690 INFO L225 Difference]: With dead ends: 5238 [2020-08-21 15:49:01,690 INFO L226 Difference]: Without dead ends: 3356 [2020-08-21 15:49:01,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-21 15:49:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-21 15:49:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-21 15:49:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-21 15:49:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-21 15:49:01,762 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 432 [2020-08-21 15:49:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:01,763 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-21 15:49:01,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:49:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-21 15:49:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-08-21 15:49:01,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:01,777 INFO L422 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:49:01,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:49:01,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1681885400, now seen corresponding path program 1 times [2020-08-21 15:49:01,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:01,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678725517] [2020-08-21 15:49:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-21 15:49:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-21 15:49:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 638 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-21 15:49:03,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678725517] [2020-08-21 15:49:03,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:49:03,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488579806] [2020-08-21 15:49:03,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:49:03,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:49:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:49:03,349 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-21 15:49:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:06,537 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-21 15:49:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 15:49:06,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 552 [2020-08-21 15:49:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:06,553 INFO L225 Difference]: With dead ends: 5701 [2020-08-21 15:49:06,553 INFO L226 Difference]: Without dead ends: 3400 [2020-08-21 15:49:06,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-21 15:49:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-21 15:49:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-21 15:49:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-21 15:49:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3494 transitions. [2020-08-21 15:49:06,642 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3494 transitions. Word has length 552 [2020-08-21 15:49:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:06,642 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3494 transitions. [2020-08-21 15:49:06,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:49:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3494 transitions. [2020-08-21 15:49:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-08-21 15:49:06,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:06,660 INFO L422 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:49:06,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:49:06,661 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 60264982, now seen corresponding path program 1 times [2020-08-21 15:49:06,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:06,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114695575] [2020-08-21 15:49:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:06,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:06,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:07,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:07,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-21 15:49:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 415 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-21 15:49:07,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114695575] [2020-08-21 15:49:07,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:07,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:49:07,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80581837] [2020-08-21 15:49:07,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:49:07,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:07,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:49:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:49:07,972 INFO L87 Difference]: Start difference. First operand 3174 states and 3494 transitions. Second operand 10 states. [2020-08-21 15:49:08,472 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-21 15:49:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:11,068 INFO L93 Difference]: Finished difference Result 5994 states and 6641 transitions. [2020-08-21 15:49:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 15:49:11,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 585 [2020-08-21 15:49:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:11,084 INFO L225 Difference]: With dead ends: 5994 [2020-08-21 15:49:11,085 INFO L226 Difference]: Without dead ends: 3192 [2020-08-21 15:49:11,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-21 15:49:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-21 15:49:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-21 15:49:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 15:49:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3485 transitions. [2020-08-21 15:49:11,166 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3485 transitions. Word has length 585 [2020-08-21 15:49:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:11,167 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3485 transitions. [2020-08-21 15:49:11,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:49:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3485 transitions. [2020-08-21 15:49:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2020-08-21 15:49:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:11,177 INFO L422 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, 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, 4, 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] [2020-08-21 15:49:11,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:49:11,177 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 762745801, now seen corresponding path program 2 times [2020-08-21 15:49:11,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:11,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483333970] [2020-08-21 15:49:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-21 15:49:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-21 15:49:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 579 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-21 15:49:12,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483333970] [2020-08-21 15:49:12,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:12,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:49:12,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760594582] [2020-08-21 15:49:12,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:49:12,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:49:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:49:12,756 INFO L87 Difference]: Start difference. First operand 3178 states and 3485 transitions. Second operand 9 states. [2020-08-21 15:49:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:15,155 INFO L93 Difference]: Finished difference Result 6354 states and 6980 transitions. [2020-08-21 15:49:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:49:15,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 695 [2020-08-21 15:49:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:15,172 INFO L225 Difference]: With dead ends: 6354 [2020-08-21 15:49:15,172 INFO L226 Difference]: Without dead ends: 3364 [2020-08-21 15:49:15,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-21 15:49:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-21 15:49:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-21 15:49:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 15:49:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3483 transitions. [2020-08-21 15:49:15,257 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3483 transitions. Word has length 695 [2020-08-21 15:49:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:15,258 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3483 transitions. [2020-08-21 15:49:15,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:49:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3483 transitions. [2020-08-21 15:49:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2020-08-21 15:49:15,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:15,273 INFO L422 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:49:15,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:49:15,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1185073778, now seen corresponding path program 1 times [2020-08-21 15:49:15,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:15,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661352933] [2020-08-21 15:49:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:15,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:15,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:15,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:15,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 15:49:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:16,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-21 15:49:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 586 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-21 15:49:16,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661352933] [2020-08-21 15:49:16,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:16,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:49:16,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565831020] [2020-08-21 15:49:16,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:49:16,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:49:16,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:49:16,518 INFO L87 Difference]: Start difference. First operand 3178 states and 3483 transitions. Second operand 10 states. [2020-08-21 15:49:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:20,039 INFO L93 Difference]: Finished difference Result 6540 states and 7198 transitions. [2020-08-21 15:49:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 15:49:20,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 702 [2020-08-21 15:49:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:20,060 INFO L225 Difference]: With dead ends: 6540 [2020-08-21 15:49:20,060 INFO L226 Difference]: Without dead ends: 3552 [2020-08-21 15:49:20,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-21 15:49:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-21 15:49:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-21 15:49:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-21 15:49:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3868 transitions. [2020-08-21 15:49:20,138 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3868 transitions. Word has length 702 [2020-08-21 15:49:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:20,139 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3868 transitions. [2020-08-21 15:49:20,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:49:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3868 transitions. [2020-08-21 15:49:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-08-21 15:49:20,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:20,149 INFO L422 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, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:49:20,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:49:20,149 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash 326490438, now seen corresponding path program 1 times [2020-08-21 15:49:20,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:20,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001926884] [2020-08-21 15:49:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 15:49:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 15:49:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 733 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-21 15:49:21,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001926884] [2020-08-21 15:49:21,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:21,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:49:21,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331467327] [2020-08-21 15:49:21,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:49:21,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:49:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:49:21,058 INFO L87 Difference]: Start difference. First operand 3548 states and 3868 transitions. Second operand 7 states. [2020-08-21 15:49:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:22,487 INFO L93 Difference]: Finished difference Result 8032 states and 8888 transitions. [2020-08-21 15:49:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:49:22,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 728 [2020-08-21 15:49:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:22,515 INFO L225 Difference]: With dead ends: 8032 [2020-08-21 15:49:22,516 INFO L226 Difference]: Without dead ends: 4674 [2020-08-21 15:49:22,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:49:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-21 15:49:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-21 15:49:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-21 15:49:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4748 transitions. [2020-08-21 15:49:22,617 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4748 transitions. Word has length 728 [2020-08-21 15:49:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:22,619 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4748 transitions. [2020-08-21 15:49:22,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:49:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4748 transitions. [2020-08-21 15:49:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2020-08-21 15:49:22,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:22,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:49:22,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:49:22,630 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1244120290, now seen corresponding path program 1 times [2020-08-21 15:49:22,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:22,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323682987] [2020-08-21 15:49:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:22,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:22,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:22,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 15:49:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:23,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 15:49:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:23,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-21 15:49:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 291 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-21 15:49:23,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323682987] [2020-08-21 15:49:23,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:23,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:49:23,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957806359] [2020-08-21 15:49:23,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:49:23,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:49:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:49:23,708 INFO L87 Difference]: Start difference. First operand 4292 states and 4748 transitions. Second operand 5 states. [2020-08-21 15:49:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:24,856 INFO L93 Difference]: Finished difference Result 4296 states and 4751 transitions. [2020-08-21 15:49:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:49:24,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 783 [2020-08-21 15:49:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:24,874 INFO L225 Difference]: With dead ends: 4296 [2020-08-21 15:49:24,874 INFO L226 Difference]: Without dead ends: 4294 [2020-08-21 15:49:24,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:49:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-21 15:49:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-21 15:49:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-21 15:49:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-21 15:49:24,951 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 783 [2020-08-21 15:49:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:24,953 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-21 15:49:24,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:49:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-21 15:49:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-08-21 15:49:24,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:24,967 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 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] [2020-08-21 15:49:24,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:49:24,967 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:24,968 INFO L82 PathProgramCache]: Analyzing trace with hash 277730204, now seen corresponding path program 1 times [2020-08-21 15:49:24,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:24,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015425243] [2020-08-21 15:49:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 15:49:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 15:49:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-21 15:49:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-21 15:49:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 340 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-21 15:49:25,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015425243] [2020-08-21 15:49:25,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:25,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:49:25,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504793006] [2020-08-21 15:49:25,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:49:25,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:49:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:49:25,911 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-21 15:49:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:27,088 INFO L93 Difference]: Finished difference Result 4668 states and 5158 transitions. [2020-08-21 15:49:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:49:27,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 828 [2020-08-21 15:49:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:27,107 INFO L225 Difference]: With dead ends: 4668 [2020-08-21 15:49:27,107 INFO L226 Difference]: Without dead ends: 4666 [2020-08-21 15:49:27,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:49:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-08-21 15:49:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4292. [2020-08-21 15:49:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-21 15:49:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4751 transitions. [2020-08-21 15:49:27,183 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4751 transitions. Word has length 828 [2020-08-21 15:49:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:27,185 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4751 transitions. [2020-08-21 15:49:27,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:49:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4751 transitions. [2020-08-21 15:49:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-08-21 15:49:27,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:49:27,199 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 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] [2020-08-21 15:49:27,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:49:27,199 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:49:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:49:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 117494447, now seen corresponding path program 1 times [2020-08-21 15:49:27,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:49:27,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339412151] [2020-08-21 15:49:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:49:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:49:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:49:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 15:49:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 15:49:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 15:49:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 15:49:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-21 15:49:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:27,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-21 15:49:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:49:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 337 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-21 15:49:28,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339412151] [2020-08-21 15:49:28,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:49:28,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:49:28,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598520237] [2020-08-21 15:49:28,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:49:28,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:49:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:49:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:49:28,240 INFO L87 Difference]: Start difference. First operand 4292 states and 4751 transitions. Second operand 7 states. [2020-08-21 15:49:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:49:30,778 INFO L93 Difference]: Finished difference Result 4854 states and 5352 transitions. [2020-08-21 15:49:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:49:30,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 839 [2020-08-21 15:49:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:49:30,783 INFO L225 Difference]: With dead ends: 4854 [2020-08-21 15:49:30,783 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:49:30,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:49:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:49:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:49:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:49:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:49:30,793 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 839 [2020-08-21 15:49:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:49:30,793 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:49:30,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:49:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:49:30,793 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:49:30,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:49:30,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:49:31,296 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-21 15:49:31,490 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163