/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/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:08:53,366 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:08:53,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:08:53,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:08:53,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:08:53,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:08:53,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:08:53,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:08:53,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:08:53,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:08:53,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:08:53,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:08:53,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:08:53,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:08:53,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:08:53,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:08:53,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:08:53,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:08:53,492 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 15:08:53,536 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:08:53,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:08:53,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:08:53,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:08:53,539 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:08:53,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:08:53,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:08:53,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:08:53,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:08:53,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:08:53,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:08:53,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:08:53,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:08:53,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:08:53,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:08:53,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:08:53,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:08:53,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:08:53,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:08:53,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:08:53,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:08:53,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:53,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:08:53,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:08:53,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:08:53,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:08:53,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:08:53,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:08:53,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:08:53,545 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 15:08:53,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:08:53,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:08:53,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:08:53,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:08:53,992 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:08:53,993 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-09-24 15:08:54,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ef035a82/efe70065933048d0a4be2e3d7fa7fec1/FLAG9703599c2 [2020-09-24 15:08:54,616 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:08:54,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-09-24 15:08:54,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ef035a82/efe70065933048d0a4be2e3d7fa7fec1/FLAG9703599c2 [2020-09-24 15:08:54,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ef035a82/efe70065933048d0a4be2e3d7fa7fec1 [2020-09-24 15:08:54,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:08:54,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:08:54,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:54,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:08:54,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:08:54,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:54" (1/1) ... [2020-09-24 15:08:54,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c364e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:54, skipping insertion in model container [2020-09-24 15:08:54,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:54" (1/1) ... [2020-09-24 15:08:54,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:08:55,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:08:55,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:55,251 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:08:55,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:55,288 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:08:55,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55 WrapperNode [2020-09-24 15:08:55,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:55,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:08:55,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:08:55,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:08:55,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (1/1) ... [2020-09-24 15:08:55,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:08:55,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:08:55,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:08:55,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:08:55,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (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 15:08:55,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:08:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:08:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 15:08:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:08:55,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:08:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:08:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 15:08:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 15:08:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:08:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:08:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:08:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:08:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:08:55,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:08:55,658 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:08:55,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:55 BoogieIcfgContainer [2020-09-24 15:08:55,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:08:55,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:08:55,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:08:55,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:08:55,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:08:54" (1/3) ... [2020-09-24 15:08:55,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:55, skipping insertion in model container [2020-09-24 15:08:55,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:55" (2/3) ... [2020-09-24 15:08:55,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:55, skipping insertion in model container [2020-09-24 15:08:55,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:55" (3/3) ... [2020-09-24 15:08:55,673 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-09-24 15:08:55,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:08:55,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:08:55,714 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:08:55,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:08:55,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:08:55,743 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:08:55,744 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:08:55,744 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:08:55,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:08:55,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:08:55,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:08:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 15:08:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 15:08:55,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:55,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:55,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash 576660498, now seen corresponding path program 1 times [2020-09-24 15:08:55,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:55,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147889991] [2020-09-24 15:08:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,016 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 15:08:56,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147889991] [2020-09-24 15:08:56,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:56,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:56,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989492132] [2020-09-24 15:08:56,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:56,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:56,055 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-09-24 15:08:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:56,187 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-09-24 15:08:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:56,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-24 15:08:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:56,201 INFO L225 Difference]: With dead ends: 46 [2020-09-24 15:08:56,202 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 15:08:56,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 15:08:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-09-24 15:08:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 15:08:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-24 15:08:56,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 11 [2020-09-24 15:08:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:56,255 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-24 15:08:56,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-24 15:08:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 15:08:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:56,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:56,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:08:56,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:56,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1548867886, now seen corresponding path program 1 times [2020-09-24 15:08:56,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:56,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162480152] [2020-09-24 15:08:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:56,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162480152] [2020-09-24 15:08:56,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:56,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:08:56,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706054988] [2020-09-24 15:08:56,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:56,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:56,380 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-24 15:08:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:56,493 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-24 15:08:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:56,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-24 15:08:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:56,495 INFO L225 Difference]: With dead ends: 36 [2020-09-24 15:08:56,496 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 15:08:56,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 15:08:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 15:08:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 15:08:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 15:08:56,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 20 [2020-09-24 15:08:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:56,506 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 15:08:56,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 15:08:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 15:08:56,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:56,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:56,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:08:56,509 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:56,509 INFO L82 PathProgramCache]: Analyzing trace with hash -677174382, now seen corresponding path program 2 times [2020-09-24 15:08:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:56,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425750869] [2020-09-24 15:08:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:08:56,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425750869] [2020-09-24 15:08:56,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:56,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:08:56,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208225184] [2020-09-24 15:08:56,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:56,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:56,652 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-24 15:08:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:56,813 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-09-24 15:08:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:56,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-09-24 15:08:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:56,815 INFO L225 Difference]: With dead ends: 45 [2020-09-24 15:08:56,816 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 15:08:56,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 15:08:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-09-24 15:08:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 15:08:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-09-24 15:08:56,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 29 [2020-09-24 15:08:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:56,831 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-09-24 15:08:56,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-09-24 15:08:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 15:08:56,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:56,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:56,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:08:56,834 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash 785729966, now seen corresponding path program 3 times [2020-09-24 15:08:56,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:56,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679489058] [2020-09-24 15:08:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:56,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 15:08:57,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679489058] [2020-09-24 15:08:57,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:57,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:08:57,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771576052] [2020-09-24 15:08:57,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:57,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:57,009 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 11 states. [2020-09-24 15:08:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:57,169 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-09-24 15:08:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:57,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-09-24 15:08:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:57,171 INFO L225 Difference]: With dead ends: 54 [2020-09-24 15:08:57,171 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 15:08:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 15:08:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-24 15:08:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 15:08:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-09-24 15:08:57,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 38 [2020-09-24 15:08:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:57,182 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-09-24 15:08:57,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-09-24 15:08:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 15:08:57,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:57,184 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:57,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:08:57,185 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1857438482, now seen corresponding path program 4 times [2020-09-24 15:08:57,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:57,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492298677] [2020-09-24 15:08:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 15:08:57,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492298677] [2020-09-24 15:08:57,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:57,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:08:57,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657533] [2020-09-24 15:08:57,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:57,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:57,373 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 13 states. [2020-09-24 15:08:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:57,621 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-24 15:08:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:08:57,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-09-24 15:08:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:57,624 INFO L225 Difference]: With dead ends: 63 [2020-09-24 15:08:57,624 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 15:08:57,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:08:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 15:08:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-09-24 15:08:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 15:08:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-09-24 15:08:57,641 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 47 [2020-09-24 15:08:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:57,641 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-09-24 15:08:57,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-09-24 15:08:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 15:08:57,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:57,647 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:57,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:08:57,647 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash -426927570, now seen corresponding path program 5 times [2020-09-24 15:08:57,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:57,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971386399] [2020-09-24 15:08:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:08:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-24 15:08:57,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971386399] [2020-09-24 15:08:57,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:57,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:08:57,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107503635] [2020-09-24 15:08:57,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:08:57,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:57,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:08:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:57,924 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 15 states. [2020-09-24 15:08:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:58,275 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-09-24 15:08:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 15:08:58,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-09-24 15:08:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:58,277 INFO L225 Difference]: With dead ends: 72 [2020-09-24 15:08:58,277 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 15:08:58,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-09-24 15:08:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 15:08:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-24 15:08:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-24 15:08:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-09-24 15:08:58,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 56 [2020-09-24 15:08:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:58,299 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-09-24 15:08:58,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 15:08:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-09-24 15:08:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 15:08:58,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:58,301 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:58,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:08:58,302 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:58,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:58,302 INFO L82 PathProgramCache]: Analyzing trace with hash -32472430, now seen corresponding path program 6 times [2020-09-24 15:08:58,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:58,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586230212] [2020-09-24 15:08:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:08:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:08:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:58,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586230212] [2020-09-24 15:08:58,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:58,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:08:58,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679649507] [2020-09-24 15:08:58,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:08:58,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:08:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:08:58,572 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 17 states. [2020-09-24 15:08:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:58,953 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-24 15:08:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 15:08:58,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-09-24 15:08:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:58,956 INFO L225 Difference]: With dead ends: 81 [2020-09-24 15:08:58,956 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 15:08:58,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2020-09-24 15:08:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 15:08:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-09-24 15:08:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 15:08:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-24 15:08:58,966 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 65 [2020-09-24 15:08:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:58,967 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-24 15:08:58,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 15:08:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-24 15:08:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 15:08:58,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:58,969 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:58,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:08:58,969 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 872598190, now seen corresponding path program 7 times [2020-09-24 15:08:58,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:58,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753200214] [2020-09-24 15:08:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:08:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:08:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:08:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-24 15:08:59,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753200214] [2020-09-24 15:08:59,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:59,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 15:08:59,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182369609] [2020-09-24 15:08:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 15:08:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 15:08:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:08:59,262 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 19 states. [2020-09-24 15:08:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:59,660 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-24 15:08:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 15:08:59,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2020-09-24 15:08:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:59,663 INFO L225 Difference]: With dead ends: 90 [2020-09-24 15:08:59,663 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 15:08:59,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 15:08:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 15:08:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-09-24 15:08:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 15:08:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-09-24 15:08:59,673 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 74 [2020-09-24 15:08:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:59,674 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-09-24 15:08:59,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 15:08:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-09-24 15:08:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 15:08:59,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:59,676 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:59,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:08:59,676 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -299245038, now seen corresponding path program 8 times [2020-09-24 15:08:59,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:59,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589522850] [2020-09-24 15:08:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:08:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:08:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:08:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:08:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:08:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-24 15:08:59,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589522850] [2020-09-24 15:08:59,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:59,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 15:08:59,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771141191] [2020-09-24 15:08:59,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 15:08:59,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 15:08:59,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:08:59,945 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 21 states. [2020-09-24 15:09:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:00,430 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-09-24 15:09:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 15:09:00,431 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-09-24 15:09:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:00,432 INFO L225 Difference]: With dead ends: 99 [2020-09-24 15:09:00,433 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 15:09:00,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=995, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 15:09:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 15:09:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-09-24 15:09:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 15:09:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-09-24 15:09:00,444 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 83 [2020-09-24 15:09:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:00,444 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-09-24 15:09:00,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 15:09:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-09-24 15:09:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 15:09:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:00,446 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:00,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:09:00,447 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1245914322, now seen corresponding path program 9 times [2020-09-24 15:09:00,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:00,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727759291] [2020-09-24 15:09:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-24 15:09:00,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727759291] [2020-09-24 15:09:00,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:00,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 15:09:00,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929518142] [2020-09-24 15:09:00,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 15:09:00,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 15:09:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:09:00,784 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 23 states. [2020-09-24 15:09:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:01,352 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-09-24 15:09:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 15:09:01,353 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-09-24 15:09:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:01,354 INFO L225 Difference]: With dead ends: 108 [2020-09-24 15:09:01,354 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 15:09:01,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 15:09:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 15:09:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-09-24 15:09:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 15:09:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-09-24 15:09:01,371 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 92 [2020-09-24 15:09:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:01,372 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-09-24 15:09:01,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 15:09:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-09-24 15:09:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-24 15:09:01,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:01,374 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:01,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:09:01,374 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2038063506, now seen corresponding path program 10 times [2020-09-24 15:09:01,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:01,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68173395] [2020-09-24 15:09:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-09-24 15:09:01,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68173395] [2020-09-24 15:09:01,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:01,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 15:09:01,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183813014] [2020-09-24 15:09:01,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 15:09:01,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 15:09:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:09:01,790 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 25 states. [2020-09-24 15:09:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:02,454 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-09-24 15:09:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 15:09:02,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-09-24 15:09:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:02,456 INFO L225 Difference]: With dead ends: 117 [2020-09-24 15:09:02,456 INFO L226 Difference]: Without dead ends: 115 [2020-09-24 15:09:02,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=1459, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 15:09:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-24 15:09:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-09-24 15:09:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 15:09:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-09-24 15:09:02,467 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 101 [2020-09-24 15:09:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:02,467 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-09-24 15:09:02,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 15:09:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-09-24 15:09:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 15:09:02,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:02,470 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:02,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:09:02,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2017708974, now seen corresponding path program 11 times [2020-09-24 15:09:02,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:02,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314287468] [2020-09-24 15:09:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-24 15:09:02,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314287468] [2020-09-24 15:09:02,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:02,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 15:09:02,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581143493] [2020-09-24 15:09:02,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 15:09:02,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 15:09:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-09-24 15:09:02,904 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 27 states. [2020-09-24 15:09:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:03,696 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-09-24 15:09:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 15:09:03,696 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-09-24 15:09:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:03,698 INFO L225 Difference]: With dead ends: 126 [2020-09-24 15:09:03,699 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 15:09:03,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=726, Invalid=1724, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 15:09:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 15:09:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-09-24 15:09:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 15:09:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-09-24 15:09:03,718 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 110 [2020-09-24 15:09:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:03,721 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-09-24 15:09:03,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 15:09:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-09-24 15:09:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 15:09:03,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:03,734 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:03,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:09:03,735 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash 746193170, now seen corresponding path program 12 times [2020-09-24 15:09:03,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:03,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174643040] [2020-09-24 15:09:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-09-24 15:09:04,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174643040] [2020-09-24 15:09:04,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:04,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 15:09:04,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016206957] [2020-09-24 15:09:04,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 15:09:04,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 15:09:04,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:09:04,312 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 29 states. [2020-09-24 15:09:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:05,121 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-09-24 15:09:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 15:09:05,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-09-24 15:09:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:05,123 INFO L225 Difference]: With dead ends: 135 [2020-09-24 15:09:05,129 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 15:09:05,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=851, Invalid=2011, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 15:09:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 15:09:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-09-24 15:09:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-24 15:09:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-09-24 15:09:05,144 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 119 [2020-09-24 15:09:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:05,145 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-09-24 15:09:05,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 15:09:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-09-24 15:09:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 15:09:05,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:05,149 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:05,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:09:05,149 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1981783086, now seen corresponding path program 13 times [2020-09-24 15:09:05,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:05,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723538577] [2020-09-24 15:09:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-24 15:09:05,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723538577] [2020-09-24 15:09:05,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:05,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 15:09:05,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256533575] [2020-09-24 15:09:05,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 15:09:05,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 15:09:05,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 15:09:05,701 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 31 states. [2020-09-24 15:09:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:06,557 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-09-24 15:09:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 15:09:06,559 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 128 [2020-09-24 15:09:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:06,560 INFO L225 Difference]: With dead ends: 144 [2020-09-24 15:09:06,560 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 15:09:06,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2320, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 15:09:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 15:09:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-09-24 15:09:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 15:09:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-09-24 15:09:06,576 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 128 [2020-09-24 15:09:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:06,577 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-09-24 15:09:06,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 15:09:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-09-24 15:09:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 15:09:06,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:06,581 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:06,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:09:06,581 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1705033874, now seen corresponding path program 14 times [2020-09-24 15:09:06,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:06,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348524561] [2020-09-24 15:09:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-09-24 15:09:07,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348524561] [2020-09-24 15:09:07,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:07,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 15:09:07,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458535920] [2020-09-24 15:09:07,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 15:09:07,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 15:09:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 15:09:07,190 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 33 states. [2020-09-24 15:09:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:08,199 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-09-24 15:09:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 15:09:08,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 137 [2020-09-24 15:09:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:08,202 INFO L225 Difference]: With dead ends: 153 [2020-09-24 15:09:08,202 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 15:09:08,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1131, Invalid=2651, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 15:09:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 15:09:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-09-24 15:09:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-24 15:09:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-09-24 15:09:08,215 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 137 [2020-09-24 15:09:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:08,216 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-09-24 15:09:08,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 15:09:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-09-24 15:09:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 15:09:08,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:08,218 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:08,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:09:08,218 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 400051374, now seen corresponding path program 15 times [2020-09-24 15:09:08,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:08,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172695937] [2020-09-24 15:09:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-24 15:09:08,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172695937] [2020-09-24 15:09:08,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:08,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 15:09:08,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112558508] [2020-09-24 15:09:08,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 15:09:08,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 15:09:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 15:09:08,881 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 35 states. [2020-09-24 15:09:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:09,971 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-09-24 15:09:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 15:09:09,972 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 146 [2020-09-24 15:09:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:09,974 INFO L225 Difference]: With dead ends: 162 [2020-09-24 15:09:09,974 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 15:09:09,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1286, Invalid=3004, Unknown=0, NotChecked=0, Total=4290 [2020-09-24 15:09:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 15:09:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-09-24 15:09:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-24 15:09:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-09-24 15:09:09,983 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 146 [2020-09-24 15:09:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:09,984 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-09-24 15:09:09,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 15:09:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-09-24 15:09:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 15:09:09,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:09,986 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:09,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:09:09,987 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash -714694638, now seen corresponding path program 16 times [2020-09-24 15:09:09,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:09,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377336304] [2020-09-24 15:09:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-09-24 15:09:10,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377336304] [2020-09-24 15:09:10,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:10,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 15:09:10,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947635126] [2020-09-24 15:09:10,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 15:09:10,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 15:09:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 15:09:10,736 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 37 states. [2020-09-24 15:09:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:12,083 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-09-24 15:09:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 15:09:12,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-09-24 15:09:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:12,087 INFO L225 Difference]: With dead ends: 171 [2020-09-24 15:09:12,088 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 15:09:12,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1451, Invalid=3379, Unknown=0, NotChecked=0, Total=4830 [2020-09-24 15:09:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 15:09:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-09-24 15:09:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 15:09:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-09-24 15:09:12,096 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 155 [2020-09-24 15:09:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:12,097 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-09-24 15:09:12,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 15:09:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-09-24 15:09:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-24 15:09:12,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:12,099 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:12,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:09:12,099 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:12,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1275732690, now seen corresponding path program 17 times [2020-09-24 15:09:12,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:12,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154982731] [2020-09-24 15:09:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-09-24 15:09:13,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154982731] [2020-09-24 15:09:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 15:09:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481912479] [2020-09-24 15:09:13,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 15:09:13,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 15:09:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 15:09:13,064 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 39 states. [2020-09-24 15:09:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:14,570 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-09-24 15:09:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 15:09:14,570 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 164 [2020-09-24 15:09:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:14,572 INFO L225 Difference]: With dead ends: 180 [2020-09-24 15:09:14,572 INFO L226 Difference]: Without dead ends: 178 [2020-09-24 15:09:14,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1626, Invalid=3776, Unknown=0, NotChecked=0, Total=5402 [2020-09-24 15:09:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-24 15:09:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2020-09-24 15:09:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 15:09:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2020-09-24 15:09:14,583 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 164 [2020-09-24 15:09:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:14,583 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2020-09-24 15:09:14,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 15:09:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2020-09-24 15:09:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 15:09:14,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:14,585 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:14,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:09:14,586 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash -29122670, now seen corresponding path program 18 times [2020-09-24 15:09:14,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:14,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495346291] [2020-09-24 15:09:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-09-24 15:09:15,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495346291] [2020-09-24 15:09:15,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:15,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 15:09:15,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009560711] [2020-09-24 15:09:15,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 15:09:15,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 15:09:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 15:09:15,426 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 41 states. [2020-09-24 15:09:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:17,048 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2020-09-24 15:09:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 15:09:17,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 173 [2020-09-24 15:09:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:17,050 INFO L225 Difference]: With dead ends: 189 [2020-09-24 15:09:17,051 INFO L226 Difference]: Without dead ends: 187 [2020-09-24 15:09:17,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1811, Invalid=4195, Unknown=0, NotChecked=0, Total=6006 [2020-09-24 15:09:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-24 15:09:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-09-24 15:09:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-09-24 15:09:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-09-24 15:09:17,061 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 173 [2020-09-24 15:09:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:17,062 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-09-24 15:09:17,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 15:09:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-09-24 15:09:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-24 15:09:17,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:17,063 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:17,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 15:09:17,064 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 251678126, now seen corresponding path program 19 times [2020-09-24 15:09:17,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:17,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122450092] [2020-09-24 15:09:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:17,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-24 15:09:18,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122450092] [2020-09-24 15:09:18,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:18,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 15:09:18,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010694001] [2020-09-24 15:09:18,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 15:09:18,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 15:09:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 15:09:18,071 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 43 states. [2020-09-24 15:09:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:19,854 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-09-24 15:09:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 15:09:19,855 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 182 [2020-09-24 15:09:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:19,856 INFO L225 Difference]: With dead ends: 198 [2020-09-24 15:09:19,857 INFO L226 Difference]: Without dead ends: 196 [2020-09-24 15:09:19,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2006, Invalid=4636, Unknown=0, NotChecked=0, Total=6642 [2020-09-24 15:09:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-24 15:09:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-09-24 15:09:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 15:09:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2020-09-24 15:09:19,866 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 182 [2020-09-24 15:09:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:19,867 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2020-09-24 15:09:19,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 15:09:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2020-09-24 15:09:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-24 15:09:19,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:19,869 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:19,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 15:09:19,869 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1263550702, now seen corresponding path program 20 times [2020-09-24 15:09:19,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:19,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554158511] [2020-09-24 15:09:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-09-24 15:09:20,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554158511] [2020-09-24 15:09:20,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:20,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 15:09:20,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137330182] [2020-09-24 15:09:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 15:09:20,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:20,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 15:09:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 15:09:20,917 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 45 states. [2020-09-24 15:09:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:22,650 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2020-09-24 15:09:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-24 15:09:22,651 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 191 [2020-09-24 15:09:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:22,652 INFO L225 Difference]: With dead ends: 207 [2020-09-24 15:09:22,653 INFO L226 Difference]: Without dead ends: 205 [2020-09-24 15:09:22,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2211, Invalid=5099, Unknown=0, NotChecked=0, Total=7310 [2020-09-24 15:09:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-24 15:09:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2020-09-24 15:09:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-09-24 15:09:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-09-24 15:09:22,665 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 191 [2020-09-24 15:09:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:22,667 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-09-24 15:09:22,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-24 15:09:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-09-24 15:09:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 15:09:22,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:22,669 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 15:09:22,669 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash -612393426, now seen corresponding path program 21 times [2020-09-24 15:09:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:22,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053135218] [2020-09-24 15:09:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-24 15:09:23,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053135218] [2020-09-24 15:09:23,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:23,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-24 15:09:23,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21017187] [2020-09-24 15:09:23,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-24 15:09:23,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-24 15:09:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 15:09:23,853 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 47 states. [2020-09-24 15:09:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:25,771 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-09-24 15:09:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-24 15:09:25,774 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 200 [2020-09-24 15:09:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:25,775 INFO L225 Difference]: With dead ends: 216 [2020-09-24 15:09:25,775 INFO L226 Difference]: Without dead ends: 214 [2020-09-24 15:09:25,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2426, Invalid=5584, Unknown=0, NotChecked=0, Total=8010 [2020-09-24 15:09:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-24 15:09:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-09-24 15:09:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-24 15:09:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-09-24 15:09:25,784 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 200 [2020-09-24 15:09:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:25,784 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-09-24 15:09:25,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-24 15:09:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-09-24 15:09:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 15:09:25,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:25,786 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:25,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 15:09:25,787 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1625096558, now seen corresponding path program 22 times [2020-09-24 15:09:25,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:25,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511566826] [2020-09-24 15:09:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-09-24 15:09:27,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511566826] [2020-09-24 15:09:27,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:27,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-24 15:09:27,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088667290] [2020-09-24 15:09:27,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-24 15:09:27,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-24 15:09:27,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 15:09:27,081 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 49 states. [2020-09-24 15:09:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:29,222 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2020-09-24 15:09:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-09-24 15:09:29,222 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 209 [2020-09-24 15:09:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:29,224 INFO L225 Difference]: With dead ends: 225 [2020-09-24 15:09:29,224 INFO L226 Difference]: Without dead ends: 223 [2020-09-24 15:09:29,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2651, Invalid=6091, Unknown=0, NotChecked=0, Total=8742 [2020-09-24 15:09:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-24 15:09:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-09-24 15:09:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-09-24 15:09:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2020-09-24 15:09:29,234 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 209 [2020-09-24 15:09:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:29,234 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2020-09-24 15:09:29,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-24 15:09:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2020-09-24 15:09:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-24 15:09:29,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:29,236 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:29,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 15:09:29,236 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash 972803758, now seen corresponding path program 23 times [2020-09-24 15:09:29,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:29,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399933981] [2020-09-24 15:09:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-24 15:09:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2369 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-09-24 15:09:30,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399933981] [2020-09-24 15:09:30,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:30,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-24 15:09:30,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792525203] [2020-09-24 15:09:30,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-24 15:09:30,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-24 15:09:30,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 15:09:30,645 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 51 states. [2020-09-24 15:09:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:33,246 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2020-09-24 15:09:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-24 15:09:33,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-09-24 15:09:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:33,249 INFO L225 Difference]: With dead ends: 234 [2020-09-24 15:09:33,249 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 15:09:33,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2886, Invalid=6620, Unknown=0, NotChecked=0, Total=9506 [2020-09-24 15:09:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 15:09:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2020-09-24 15:09:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-09-24 15:09:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2020-09-24 15:09:33,259 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 218 [2020-09-24 15:09:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:33,259 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2020-09-24 15:09:33,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-24 15:09:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2020-09-24 15:09:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-09-24 15:09:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:33,261 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:33,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 15:09:33,261 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1240113646, now seen corresponding path program 24 times [2020-09-24 15:09:33,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:33,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229523184] [2020-09-24 15:09:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-24 15:09:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-24 15:09:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-09-24 15:09:34,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229523184] [2020-09-24 15:09:34,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:34,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-24 15:09:34,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625341924] [2020-09-24 15:09:34,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-24 15:09:34,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-24 15:09:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 15:09:34,810 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 53 states. [2020-09-24 15:09:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:37,353 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2020-09-24 15:09:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-09-24 15:09:37,354 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 227 [2020-09-24 15:09:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:37,357 INFO L225 Difference]: With dead ends: 243 [2020-09-24 15:09:37,357 INFO L226 Difference]: Without dead ends: 241 [2020-09-24 15:09:37,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3131, Invalid=7171, Unknown=0, NotChecked=0, Total=10302 [2020-09-24 15:09:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-24 15:09:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-09-24 15:09:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-09-24 15:09:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2020-09-24 15:09:37,375 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 227 [2020-09-24 15:09:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:37,376 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2020-09-24 15:09:37,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-24 15:09:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2020-09-24 15:09:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-24 15:09:37,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:37,382 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:37,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 15:09:37,382 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash 956096302, now seen corresponding path program 25 times [2020-09-24 15:09:37,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:37,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321191727] [2020-09-24 15:09:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:39,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:39,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-24 15:09:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:39,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-24 15:09:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:39,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-09-24 15:09:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-09-24 15:09:39,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321191727] [2020-09-24 15:09:39,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:39,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-09-24 15:09:39,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960378587] [2020-09-24 15:09:39,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-24 15:09:39,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-24 15:09:39,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 15:09:39,056 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 55 states. [2020-09-24 15:09:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:41,902 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2020-09-24 15:09:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-24 15:09:41,902 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 236 [2020-09-24 15:09:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:41,904 INFO L225 Difference]: With dead ends: 252 [2020-09-24 15:09:41,904 INFO L226 Difference]: Without dead ends: 250 [2020-09-24 15:09:41,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3386, Invalid=7744, Unknown=0, NotChecked=0, Total=11130 [2020-09-24 15:09:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-24 15:09:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2020-09-24 15:09:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-09-24 15:09:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2020-09-24 15:09:41,914 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 236 [2020-09-24 15:09:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:41,914 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2020-09-24 15:09:41,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-24 15:09:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2020-09-24 15:09:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-09-24 15:09:41,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:41,916 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:41,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 15:09:41,916 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1006707310, now seen corresponding path program 26 times [2020-09-24 15:09:41,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:41,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882369296] [2020-09-24 15:09:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-24 15:09:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-24 15:09:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-09-24 15:09:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-24 15:09:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-09-24 15:09:43,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882369296] [2020-09-24 15:09:43,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:43,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-24 15:09:43,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017756783] [2020-09-24 15:09:43,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-24 15:09:43,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-24 15:09:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 15:09:43,662 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 57 states. [2020-09-24 15:09:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:47,031 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-09-24 15:09:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-09-24 15:09:47,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 245 [2020-09-24 15:09:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:47,033 INFO L225 Difference]: With dead ends: 261 [2020-09-24 15:09:47,033 INFO L226 Difference]: Without dead ends: 259 [2020-09-24 15:09:47,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3651, Invalid=8339, Unknown=0, NotChecked=0, Total=11990 [2020-09-24 15:09:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-24 15:09:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2020-09-24 15:09:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-09-24 15:09:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-09-24 15:09:47,046 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 245 [2020-09-24 15:09:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:47,047 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-09-24 15:09:47,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-24 15:09:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-09-24 15:09:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-09-24 15:09:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:47,050 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:47,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 15:09:47,050 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1426771886, now seen corresponding path program 27 times [2020-09-24 15:09:47,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:47,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329225704] [2020-09-24 15:09:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:09:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:09:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:09:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:09:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 15:09:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 15:09:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:09:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:09:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 15:09:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 15:09:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:09:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:09:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:09:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 15:09:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:09:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:09:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-09-24 15:09:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 15:09:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 15:09:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 15:09:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-09-24 15:09:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-24 15:09:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-09-24 15:09:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-09-24 15:09:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-24 15:09:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-09-24 15:09:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-09-24 15:09:48,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329225704] [2020-09-24 15:09:48,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:48,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-09-24 15:09:48,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648075818] [2020-09-24 15:09:48,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-24 15:09:48,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:48,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-24 15:09:48,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 15:09:48,919 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 59 states.