/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:03:40,382 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:03:40,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:03:40,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:03:40,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:03:40,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:03:40,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:03:40,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:03:40,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:03:40,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:03:40,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:03:40,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:03:40,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:03:40,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:03:40,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:03:40,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:03:40,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:03:40,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:03:40,514 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 [2020-09-24 15:03:40,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:03:40,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:03:40,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:03:40,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:03:40,574 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:03:40,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:03:40,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:03:40,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:03:40,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:03:40,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:03:40,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:03:40,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:03:40,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:03:40,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:03:40,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:03:40,578 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:03:40,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:03:40,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:03:40,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:03:40,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:03:40,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:03:40,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:03:40,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:03:40,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:03:40,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:03:40,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:03:40,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:03:40,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:03:40,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:03:40,581 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:03:41,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:03:41,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:03:41,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:03:41,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:03:41,035 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:03:41,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label44.c [2020-09-24 15:03:41,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24e0553c2/e3acf5da3bfb4e159472cf5c3be4f272/FLAGf23dfb88a [2020-09-24 15:03:41,787 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:03:41,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label44.c [2020-09-24 15:03:41,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24e0553c2/e3acf5da3bfb4e159472cf5c3be4f272/FLAGf23dfb88a [2020-09-24 15:03:42,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24e0553c2/e3acf5da3bfb4e159472cf5c3be4f272 [2020-09-24 15:03:42,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:03:42,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:03:42,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:42,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:03:42,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:03:42,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3705ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42, skipping insertion in model container [2020-09-24 15:03:42,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:03:42,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:03:42,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:42,580 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:03:42,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:42,841 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:03:42,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42 WrapperNode [2020-09-24 15:03:42,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:42,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:03:42,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:03:42,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:03:42,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:42,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:43,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:43,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (1/1) ... [2020-09-24 15:03:43,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:03:43,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:03:43,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:03:43,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:03:43,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (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 [2020-09-24 15:03:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:03:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:03:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:03:43,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:03:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:03:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:03:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:03:44,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:03:44,989 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:03:44,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:44 BoogieIcfgContainer [2020-09-24 15:03:44,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:03:45,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:03:45,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:03:45,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:03:45,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:03:42" (1/3) ... [2020-09-24 15:03:45,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31398288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:45, skipping insertion in model container [2020-09-24 15:03:45,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:42" (2/3) ... [2020-09-24 15:03:45,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31398288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:45, skipping insertion in model container [2020-09-24 15:03:45,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:44" (3/3) ... [2020-09-24 15:03:45,009 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label44.c [2020-09-24 15:03:45,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:03:45,034 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:03:45,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:03:45,092 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:03:45,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:03:45,092 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:03:45,092 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:03:45,093 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:03:45,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:03:45,093 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:03:45,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:03:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 15:03:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 15:03:45,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:45,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:45,138 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2145887279, now seen corresponding path program 1 times [2020-09-24 15:03:45,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:45,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732017845] [2020-09-24 15:03:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:45,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:45,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732017845] [2020-09-24 15:03:45,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:45,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:03:45,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337141371] [2020-09-24 15:03:45,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:03:45,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:45,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:03:45,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:03:45,674 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 5 states. [2020-09-24 15:03:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:48,642 INFO L93 Difference]: Finished difference Result 1246 states and 1816 transitions. [2020-09-24 15:03:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:03:48,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-09-24 15:03:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:48,693 INFO L225 Difference]: With dead ends: 1246 [2020-09-24 15:03:48,693 INFO L226 Difference]: Without dead ends: 727 [2020-09-24 15:03:48,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-09-24 15:03:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 697. [2020-09-24 15:03:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-09-24 15:03:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 849 transitions. [2020-09-24 15:03:48,840 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 849 transitions. Word has length 76 [2020-09-24 15:03:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:48,841 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 849 transitions. [2020-09-24 15:03:48,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:03:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 849 transitions. [2020-09-24 15:03:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-24 15:03:48,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:48,853 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, 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] [2020-09-24 15:03:48,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:03:48,853 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -430892963, now seen corresponding path program 1 times [2020-09-24 15:03:48,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:48,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233589688] [2020-09-24 15:03:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:49,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233589688] [2020-09-24 15:03:49,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:49,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:03:49,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764875074] [2020-09-24 15:03:49,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:49,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:49,307 INFO L87 Difference]: Start difference. First operand 697 states and 849 transitions. Second operand 8 states. [2020-09-24 15:03:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:52,843 INFO L93 Difference]: Finished difference Result 2464 states and 3167 transitions. [2020-09-24 15:03:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:03:52,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2020-09-24 15:03:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:52,861 INFO L225 Difference]: With dead ends: 2464 [2020-09-24 15:03:52,861 INFO L226 Difference]: Without dead ends: 1782 [2020-09-24 15:03:52,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2020-09-24 15:03:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1667. [2020-09-24 15:03:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2020-09-24 15:03:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2089 transitions. [2020-09-24 15:03:52,977 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2089 transitions. Word has length 165 [2020-09-24 15:03:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:52,980 INFO L479 AbstractCegarLoop]: Abstraction has 1667 states and 2089 transitions. [2020-09-24 15:03:52,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2089 transitions. [2020-09-24 15:03:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-09-24 15:03:52,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:53,001 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, 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] [2020-09-24 15:03:53,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:03:53,001 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1682807623, now seen corresponding path program 1 times [2020-09-24 15:03:53,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:53,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687503094] [2020-09-24 15:03:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:53,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687503094] [2020-09-24 15:03:53,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:53,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:53,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619535192] [2020-09-24 15:03:53,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:53,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:53,364 INFO L87 Difference]: Start difference. First operand 1667 states and 2089 transitions. Second operand 8 states. [2020-09-24 15:03:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:55,318 INFO L93 Difference]: Finished difference Result 4069 states and 5422 transitions. [2020-09-24 15:03:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:03:55,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2020-09-24 15:03:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:55,337 INFO L225 Difference]: With dead ends: 4069 [2020-09-24 15:03:55,337 INFO L226 Difference]: Without dead ends: 2417 [2020-09-24 15:03:55,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2020-09-24 15:03:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2303. [2020-09-24 15:03:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-09-24 15:03:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2900 transitions. [2020-09-24 15:03:55,421 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2900 transitions. Word has length 208 [2020-09-24 15:03:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:55,421 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2900 transitions. [2020-09-24 15:03:55,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2900 transitions. [2020-09-24 15:03:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-09-24 15:03:55,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:55,427 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, 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, 1, 1] [2020-09-24 15:03:55,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:03:55,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1390539425, now seen corresponding path program 1 times [2020-09-24 15:03:55,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:55,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649752742] [2020-09-24 15:03:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 15:03:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649752742] [2020-09-24 15:03:55,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:55,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:03:55,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050990848] [2020-09-24 15:03:55,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:55,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:55,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:55,786 INFO L87 Difference]: Start difference. First operand 2303 states and 2900 transitions. Second operand 7 states. [2020-09-24 15:03:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:58,418 INFO L93 Difference]: Finished difference Result 3985 states and 5163 transitions. [2020-09-24 15:03:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:03:58,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 222 [2020-09-24 15:03:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:58,440 INFO L225 Difference]: With dead ends: 3985 [2020-09-24 15:03:58,441 INFO L226 Difference]: Without dead ends: 3983 [2020-09-24 15:03:58,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:03:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2020-09-24 15:03:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3067. [2020-09-24 15:03:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3067 states. [2020-09-24 15:03:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 3950 transitions. [2020-09-24 15:03:58,541 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 3950 transitions. Word has length 222 [2020-09-24 15:03:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:58,542 INFO L479 AbstractCegarLoop]: Abstraction has 3067 states and 3950 transitions. [2020-09-24 15:03:58,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:03:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 3950 transitions. [2020-09-24 15:03:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 15:03:58,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:58,548 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:58,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:03:58,548 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1504222835, now seen corresponding path program 1 times [2020-09-24 15:03:58,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:58,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66890925] [2020-09-24 15:03:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:03:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 186 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:03:58,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66890925] [2020-09-24 15:03:58,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:58,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:03:58,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414028408] [2020-09-24 15:03:58,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:03:58,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:03:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:03:58,952 INFO L87 Difference]: Start difference. First operand 3067 states and 3950 transitions. Second operand 10 states. [2020-09-24 15:03:59,426 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-09-24 15:04:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:04,002 INFO L93 Difference]: Finished difference Result 7409 states and 9548 transitions. [2020-09-24 15:04:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:04,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 244 [2020-09-24 15:04:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:04,023 INFO L225 Difference]: With dead ends: 7409 [2020-09-24 15:04:04,024 INFO L226 Difference]: Without dead ends: 4357 [2020-09-24 15:04:04,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:04:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2020-09-24 15:04:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 3423. [2020-09-24 15:04:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3423 states. [2020-09-24 15:04:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 4237 transitions. [2020-09-24 15:04:04,135 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 4237 transitions. Word has length 244 [2020-09-24 15:04:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:04,136 INFO L479 AbstractCegarLoop]: Abstraction has 3423 states and 4237 transitions. [2020-09-24 15:04:04,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:04:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 4237 transitions. [2020-09-24 15:04:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-24 15:04:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:04,154 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, 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, 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] [2020-09-24 15:04:04,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:04,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2056188943, now seen corresponding path program 1 times [2020-09-24 15:04:04,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:04,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788193469] [2020-09-24 15:04:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 15:04:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 263 proven. 73 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-24 15:04:04,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788193469] [2020-09-24 15:04:04,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:04,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:04,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114123039] [2020-09-24 15:04:04,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:04,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:04,680 INFO L87 Difference]: Start difference. First operand 3423 states and 4237 transitions. Second operand 7 states. [2020-09-24 15:04:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:07,079 INFO L93 Difference]: Finished difference Result 7031 states and 8729 transitions. [2020-09-24 15:04:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:07,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 327 [2020-09-24 15:04:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:07,095 INFO L225 Difference]: With dead ends: 7031 [2020-09-24 15:04:07,095 INFO L226 Difference]: Without dead ends: 3623 [2020-09-24 15:04:07,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2020-09-24 15:04:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3591. [2020-09-24 15:04:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3591 states. [2020-09-24 15:04:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 4376 transitions. [2020-09-24 15:04:07,196 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 4376 transitions. Word has length 327 [2020-09-24 15:04:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:07,196 INFO L479 AbstractCegarLoop]: Abstraction has 3591 states and 4376 transitions. [2020-09-24 15:04:07,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 4376 transitions. [2020-09-24 15:04:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 15:04:07,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:07,210 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, 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, 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] [2020-09-24 15:04:07,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:04:07,210 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:07,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1129363078, now seen corresponding path program 1 times [2020-09-24 15:04:07,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:07,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026761775] [2020-09-24 15:04:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 15:04:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-24 15:04:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 180 proven. 141 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-24 15:04:07,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026761775] [2020-09-24 15:04:07,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:07,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:07,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077296481] [2020-09-24 15:04:07,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:07,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:07,602 INFO L87 Difference]: Start difference. First operand 3591 states and 4376 transitions. Second operand 7 states. [2020-09-24 15:04:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:09,708 INFO L93 Difference]: Finished difference Result 7348 states and 8960 transitions. [2020-09-24 15:04:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:04:09,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 334 [2020-09-24 15:04:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:09,724 INFO L225 Difference]: With dead ends: 7348 [2020-09-24 15:04:09,724 INFO L226 Difference]: Without dead ends: 3772 [2020-09-24 15:04:09,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2020-09-24 15:04:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3149. [2020-09-24 15:04:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2020-09-24 15:04:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 3768 transitions. [2020-09-24 15:04:09,815 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 3768 transitions. Word has length 334 [2020-09-24 15:04:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:09,815 INFO L479 AbstractCegarLoop]: Abstraction has 3149 states and 3768 transitions. [2020-09-24 15:04:09,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 3768 transitions. [2020-09-24 15:04:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-24 15:04:09,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:09,828 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, 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, 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] [2020-09-24 15:04:09,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:09,828 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1318397123, now seen corresponding path program 1 times [2020-09-24 15:04:09,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:09,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427218510] [2020-09-24 15:04:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:09,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:09,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-24 15:04:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 200 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:04:10,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427218510] [2020-09-24 15:04:10,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:10,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:10,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011472734] [2020-09-24 15:04:10,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:10,592 INFO L87 Difference]: Start difference. First operand 3149 states and 3768 transitions. Second operand 11 states. [2020-09-24 15:04:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:15,238 INFO L93 Difference]: Finished difference Result 7355 states and 8941 transitions. [2020-09-24 15:04:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 15:04:15,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 339 [2020-09-24 15:04:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:15,259 INFO L225 Difference]: With dead ends: 7355 [2020-09-24 15:04:15,259 INFO L226 Difference]: Without dead ends: 4371 [2020-09-24 15:04:15,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:04:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2020-09-24 15:04:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4122. [2020-09-24 15:04:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4122 states. [2020-09-24 15:04:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4977 transitions. [2020-09-24 15:04:15,362 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4977 transitions. Word has length 339 [2020-09-24 15:04:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:15,362 INFO L479 AbstractCegarLoop]: Abstraction has 4122 states and 4977 transitions. [2020-09-24 15:04:15,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4977 transitions. [2020-09-24 15:04:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 15:04:15,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:15,387 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, 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, 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] [2020-09-24 15:04:15,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:04:15,391 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:15,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1305997719, now seen corresponding path program 1 times [2020-09-24 15:04:15,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:15,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201386421] [2020-09-24 15:04:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 15:04:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-24 15:04:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 344 proven. 16 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-24 15:04:16,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201386421] [2020-09-24 15:04:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:16,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162392507] [2020-09-24 15:04:16,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:16,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:16,018 INFO L87 Difference]: Start difference. First operand 4122 states and 4977 transitions. Second operand 11 states. [2020-09-24 15:04:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:20,236 INFO L93 Difference]: Finished difference Result 10649 states and 12967 transitions. [2020-09-24 15:04:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:04:20,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 402 [2020-09-24 15:04:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:20,263 INFO L225 Difference]: With dead ends: 10649 [2020-09-24 15:04:20,264 INFO L226 Difference]: Without dead ends: 4615 [2020-09-24 15:04:20,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:04:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2020-09-24 15:04:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 3552. [2020-09-24 15:04:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3552 states. [2020-09-24 15:04:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 3945 transitions. [2020-09-24 15:04:20,363 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 3945 transitions. Word has length 402 [2020-09-24 15:04:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:20,364 INFO L479 AbstractCegarLoop]: Abstraction has 3552 states and 3945 transitions. [2020-09-24 15:04:20,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 3945 transitions. [2020-09-24 15:04:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-24 15:04:20,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:20,382 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, 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, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:20,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:04:20,383 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1447415977, now seen corresponding path program 1 times [2020-09-24 15:04:20,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:20,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632774707] [2020-09-24 15:04:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 15:04:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-09-24 15:04:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-24 15:04:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 215 proven. 431 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-09-24 15:04:21,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632774707] [2020-09-24 15:04:21,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:21,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 15:04:21,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922767546] [2020-09-24 15:04:21,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 15:04:21,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:21,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 15:04:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:04:21,371 INFO L87 Difference]: Start difference. First operand 3552 states and 3945 transitions. Second operand 16 states. [2020-09-24 15:04:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:28,540 INFO L93 Difference]: Finished difference Result 9207 states and 10393 transitions. [2020-09-24 15:04:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 15:04:28,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 458 [2020-09-24 15:04:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:28,564 INFO L225 Difference]: With dead ends: 9207 [2020-09-24 15:04:28,564 INFO L226 Difference]: Without dead ends: 5669 [2020-09-24 15:04:28,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 15:04:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2020-09-24 15:04:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4637. [2020-09-24 15:04:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4637 states. [2020-09-24 15:04:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 5203 transitions. [2020-09-24 15:04:28,726 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 5203 transitions. Word has length 458 [2020-09-24 15:04:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:28,727 INFO L479 AbstractCegarLoop]: Abstraction has 4637 states and 5203 transitions. [2020-09-24 15:04:28,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 15:04:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 5203 transitions. [2020-09-24 15:04:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-24 15:04:28,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:28,743 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, 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, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:28,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:04:28,743 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -968828418, now seen corresponding path program 1 times [2020-09-24 15:04:28,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:28,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071811836] [2020-09-24 15:04:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:29,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:29,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-24 15:04:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:29,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-24 15:04:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 288 proven. 370 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-24 15:04:29,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071811836] [2020-09-24 15:04:29,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:29,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:04:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148109212] [2020-09-24 15:04:29,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:04:29,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:04:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:04:29,533 INFO L87 Difference]: Start difference. First operand 4637 states and 5203 transitions. Second operand 17 states. [2020-09-24 15:04:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:37,163 INFO L93 Difference]: Finished difference Result 13156 states and 14911 transitions. [2020-09-24 15:04:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 15:04:37,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-09-24 15:04:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:37,186 INFO L225 Difference]: With dead ends: 13156 [2020-09-24 15:04:37,186 INFO L226 Difference]: Without dead ends: 8689 [2020-09-24 15:04:37,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1073, Invalid=3087, Unknown=0, NotChecked=0, Total=4160 [2020-09-24 15:04:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8689 states. [2020-09-24 15:04:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8689 to 7187. [2020-09-24 15:04:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7187 states. [2020-09-24 15:04:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7187 states to 7187 states and 8165 transitions. [2020-09-24 15:04:37,341 INFO L78 Accepts]: Start accepts. Automaton has 7187 states and 8165 transitions. Word has length 476 [2020-09-24 15:04:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:37,342 INFO L479 AbstractCegarLoop]: Abstraction has 7187 states and 8165 transitions. [2020-09-24 15:04:37,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 15:04:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7187 states and 8165 transitions. [2020-09-24 15:04:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-09-24 15:04:37,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:37,359 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, 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, 3, 3, 3, 3, 3, 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] [2020-09-24 15:04:37,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:04:37,360 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:37,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1319219488, now seen corresponding path program 1 times [2020-09-24 15:04:37,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:37,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710303071] [2020-09-24 15:04:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 15:04:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-09-24 15:04:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2020-09-24 15:04:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 421 proven. 73 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2020-09-24 15:04:37,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710303071] [2020-09-24 15:04:37,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:37,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852801092] [2020-09-24 15:04:37,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:37,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:37,864 INFO L87 Difference]: Start difference. First operand 7187 states and 8165 transitions. Second operand 7 states.