/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:56:23,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:56:23,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:56:23,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:56:23,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:56:23,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:56:23,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:56:23,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:56:23,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:56:23,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:56:23,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:56:23,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:56:23,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:56:23,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:56:23,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:56:23,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:56:23,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:56:23,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:56:23,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:56:23,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:56:23,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:56:23,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:56:23,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:56:23,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:56:23,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:56:23,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:56:23,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:56:23,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:56:23,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:56:23,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:56:23,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:56:23,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:56:23,674 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:56:23,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:56:23,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:56:23,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:56:23,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:56:23,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:56:23,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:56:23,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:56:23,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:56:23,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:56:23,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:56:23,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:56:23,677 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:56:23,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:56:23,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:56:23,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:56:23,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:56:23,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:56:23,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:56:23,679 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:56:24,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:56:24,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:56:24,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:56:24,212 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:56:24,213 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:56:24,214 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-09-04 17:56:24,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e986a71/861b50a7b9c749989839f5f3b728b9c2/FLAG5c3a78ced [2020-09-04 17:56:25,038 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:56:25,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-09-04 17:56:25,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e986a71/861b50a7b9c749989839f5f3b728b9c2/FLAG5c3a78ced [2020-09-04 17:56:25,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e986a71/861b50a7b9c749989839f5f3b728b9c2 [2020-09-04 17:56:25,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:56:25,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:56:25,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:56:25,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:56:25,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:56:25,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fb128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25, skipping insertion in model container [2020-09-04 17:56:25,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:56:25,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:56:25,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:56:25,721 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:56:25,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:56:25,765 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:56:25,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25 WrapperNode [2020-09-04 17:56:25,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:56:25,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:56:25,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:56:25,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:56:25,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (1/1) ... [2020-09-04 17:56:25,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:56:25,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:56:25,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:56:25,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:56:25,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (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 [2020-09-04 17:56:25,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:56:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:56:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:56:25,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:56:25,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:56:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:56:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:56:25,981 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:56:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:56:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:56:25,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:56:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:56:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:56:26,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:56:26,330 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:56:26,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:56:26 BoogieIcfgContainer [2020-09-04 17:56:26,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:56:26,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:56:26,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:56:26,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:56:26,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:56:25" (1/3) ... [2020-09-04 17:56:26,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484bf35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:56:26, skipping insertion in model container [2020-09-04 17:56:26,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:56:25" (2/3) ... [2020-09-04 17:56:26,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484bf35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:56:26, skipping insertion in model container [2020-09-04 17:56:26,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:56:26" (3/3) ... [2020-09-04 17:56:26,352 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt3.c [2020-09-04 17:56:26,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:56:26,388 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:56:26,419 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:56:26,486 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:56:26,487 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:56:26,487 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:56:26,487 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:56:26,487 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:56:26,487 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:56:26,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:56:26,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:56:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-04 17:56:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 17:56:26,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:26,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:26,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1514708489, now seen corresponding path program 1 times [2020-09-04 17:56:26,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:26,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249242297] [2020-09-04 17:56:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:26,631 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:27,193 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-09-04 17:56:27,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:27,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249242297] [2020-09-04 17:56:27,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:27,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:56:27,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416886976] [2020-09-04 17:56:27,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:56:27,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:56:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:56:27,419 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 10 states. [2020-09-04 17:56:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:28,073 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-09-04 17:56:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:56:28,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-09-04 17:56:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:28,090 INFO L225 Difference]: With dead ends: 68 [2020-09-04 17:56:28,090 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 17:56:28,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:56:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 17:56:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-04 17:56:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 17:56:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-04 17:56:28,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-09-04 17:56:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:28,158 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-04 17:56:28,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:56:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-04 17:56:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:56:28,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:28,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:28,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:56:28,161 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 993233083, now seen corresponding path program 1 times [2020-09-04 17:56:28,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:28,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850895355] [2020-09-04 17:56:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:28,186 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:28,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:28,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850895355] [2020-09-04 17:56:28,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:28,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:56:28,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393095695] [2020-09-04 17:56:28,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:56:28,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:28,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:56:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:56:28,987 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-09-04 17:56:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:29,840 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-04 17:56:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:56:29,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-09-04 17:56:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:29,843 INFO L225 Difference]: With dead ends: 45 [2020-09-04 17:56:29,843 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 17:56:29,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:56:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 17:56:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-09-04 17:56:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 17:56:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-04 17:56:29,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-09-04 17:56:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:29,861 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-04 17:56:29,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:56:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-04 17:56:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 17:56:29,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:29,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:29,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:56:29,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2107258259, now seen corresponding path program 2 times [2020-09-04 17:56:29,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:29,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538040411] [2020-09-04 17:56:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:29,873 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:30,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:30,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538040411] [2020-09-04 17:56:30,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:30,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:56:30,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867552389] [2020-09-04 17:56:30,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:56:30,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:56:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:56:30,269 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-09-04 17:56:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:39,037 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-09-04 17:56:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:56:39,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-04 17:56:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:39,109 INFO L225 Difference]: With dead ends: 61 [2020-09-04 17:56:39,110 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 17:56:39,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:56:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 17:56:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-09-04 17:56:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 17:56:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-04 17:56:39,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-09-04 17:56:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:39,126 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-04 17:56:39,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:56:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-04 17:56:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 17:56:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:39,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:39,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:56:39,129 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1595204474, now seen corresponding path program 1 times [2020-09-04 17:56:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:39,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853987761] [2020-09-04 17:56:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:39,138 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:39,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:39,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853987761] [2020-09-04 17:56:39,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:39,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:56:39,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634869568] [2020-09-04 17:56:39,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:56:39,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:56:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:56:39,244 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-09-04 17:56:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:39,382 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-09-04 17:56:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:56:39,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-09-04 17:56:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:39,384 INFO L225 Difference]: With dead ends: 51 [2020-09-04 17:56:39,384 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 17:56:39,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:56:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 17:56:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-04 17:56:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 17:56:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-09-04 17:56:39,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-09-04 17:56:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:39,400 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-09-04 17:56:39,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:56:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-09-04 17:56:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 17:56:39,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:39,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:39,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:56:39,402 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2000770278, now seen corresponding path program 1 times [2020-09-04 17:56:39,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:39,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676810178] [2020-09-04 17:56:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:39,410 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:40,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:40,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676810178] [2020-09-04 17:56:40,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:40,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 17:56:40,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736805179] [2020-09-04 17:56:40,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 17:56:40,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 17:56:40,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:56:40,355 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-09-04 17:56:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:41,387 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-04 17:56:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 17:56:41,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-09-04 17:56:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:41,389 INFO L225 Difference]: With dead ends: 50 [2020-09-04 17:56:41,389 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 17:56:41,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:56:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 17:56:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-09-04 17:56:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 17:56:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-04 17:56:41,419 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-04 17:56:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:41,421 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-04 17:56:41,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 17:56:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-04 17:56:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 17:56:41,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:41,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:41,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:56:41,425 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash 755730712, now seen corresponding path program 2 times [2020-09-04 17:56:41,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:41,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529152475] [2020-09-04 17:56:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:41,437 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:41,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:41,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529152475] [2020-09-04 17:56:41,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:41,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:56:41,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663577439] [2020-09-04 17:56:41,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:56:41,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:56:41,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:56:41,936 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-04 17:56:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:42,636 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-09-04 17:56:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:56:42,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-09-04 17:56:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:42,639 INFO L225 Difference]: With dead ends: 57 [2020-09-04 17:56:42,639 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 17:56:42,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:56:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 17:56:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-09-04 17:56:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 17:56:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-04 17:56:42,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-09-04 17:56:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:42,682 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-04 17:56:42,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:56:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-04 17:56:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 17:56:42,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:42,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:42,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:56:42,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1258107707, now seen corresponding path program 1 times [2020-09-04 17:56:42,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:42,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880721006] [2020-09-04 17:56:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:42,702 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:43,647 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-09-04 17:56:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:44,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880721006] [2020-09-04 17:56:44,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:44,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-04 17:56:44,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412003190] [2020-09-04 17:56:44,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 17:56:44,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 17:56:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:56:44,015 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2020-09-04 17:56:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:47,414 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-09-04 17:56:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:56:47,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-09-04 17:56:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:47,416 INFO L225 Difference]: With dead ends: 65 [2020-09-04 17:56:47,416 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 17:56:47,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 17:56:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 17:56:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-09-04 17:56:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 17:56:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-09-04 17:56:47,434 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-09-04 17:56:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:47,435 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-09-04 17:56:47,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 17:56:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-09-04 17:56:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:56:47,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:47,436 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:47,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:56:47,437 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -397003539, now seen corresponding path program 2 times [2020-09-04 17:56:47,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:47,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636309168] [2020-09-04 17:56:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:47,454 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:48,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:48,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636309168] [2020-09-04 17:56:48,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:48,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-04 17:56:48,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398101550] [2020-09-04 17:56:48,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 17:56:48,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 17:56:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-09-04 17:56:48,573 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-09-04 17:56:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:49,972 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-04 17:56:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 17:56:49,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-09-04 17:56:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:49,975 INFO L225 Difference]: With dead ends: 69 [2020-09-04 17:56:49,975 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 17:56:49,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 17:56:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 17:56:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-04 17:56:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 17:56:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-09-04 17:56:50,013 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-09-04 17:56:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:50,014 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-09-04 17:56:50,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 17:56:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-09-04 17:56:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 17:56:50,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:50,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:50,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:56:50,017 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1225985439, now seen corresponding path program 3 times [2020-09-04 17:56:50,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:50,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652014197] [2020-09-04 17:56:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:50,033 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:50,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652014197] [2020-09-04 17:56:50,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:50,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:56:50,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937364568] [2020-09-04 17:56:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 17:56:50,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 17:56:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:56:50,685 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 13 states. [2020-09-04 17:56:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:53,969 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-09-04 17:56:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:56:53,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-09-04 17:56:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:53,971 INFO L225 Difference]: With dead ends: 66 [2020-09-04 17:56:53,972 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 17:56:53,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2020-09-04 17:56:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 17:56:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-04 17:56:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 17:56:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-04 17:56:53,989 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-09-04 17:56:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:53,989 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-04 17:56:53,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 17:56:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-04 17:56:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 17:56:53,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:53,991 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:53,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:56:53,991 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1343864940, now seen corresponding path program 4 times [2020-09-04 17:56:53,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:53,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839026894] [2020-09-04 17:56:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:53,999 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:55,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:55,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839026894] [2020-09-04 17:56:55,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:55,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-09-04 17:56:55,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356079443] [2020-09-04 17:56:55,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 17:56:55,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 17:56:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-09-04 17:56:55,309 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2020-09-04 17:56:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:57,048 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-09-04 17:56:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 17:56:57,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-09-04 17:56:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:57,050 INFO L225 Difference]: With dead ends: 74 [2020-09-04 17:56:57,050 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 17:56:57,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 17:56:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 17:56:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-09-04 17:56:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 17:56:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-09-04 17:56:57,089 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2020-09-04 17:56:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:57,090 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-09-04 17:56:57,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 17:56:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-09-04 17:56:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 17:56:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:57,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:57,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:56:57,092 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1589603526, now seen corresponding path program 5 times [2020-09-04 17:56:57,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:57,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747813144] [2020-09-04 17:56:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:57,102 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:57,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:57,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747813144] [2020-09-04 17:56:57,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:57,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:56:57,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44768090] [2020-09-04 17:56:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:56:57,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:56:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:56:57,690 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-09-04 17:56:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:58,770 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-09-04 17:56:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:56:58,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-09-04 17:56:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:58,772 INFO L225 Difference]: With dead ends: 71 [2020-09-04 17:56:58,772 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 17:56:58,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:56:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 17:56:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-09-04 17:56:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 17:56:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-04 17:56:58,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-09-04 17:56:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:58,793 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-04 17:56:58,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:56:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-04 17:56:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 17:56:58,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:58,794 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:58,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:56:58,795 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1338361165, now seen corresponding path program 6 times [2020-09-04 17:56:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:58,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066325841] [2020-09-04 17:56:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:58,803 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:58,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:56:58,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066325841] [2020-09-04 17:56:58,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:58,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:56:58,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348043672] [2020-09-04 17:56:58,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:56:58,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:56:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:56:58,948 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 9 states. [2020-09-04 17:56:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:59,350 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-09-04 17:56:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:56:59,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-04 17:56:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:59,352 INFO L225 Difference]: With dead ends: 70 [2020-09-04 17:56:59,352 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 17:56:59,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:56:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 17:56:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-04 17:56:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 17:56:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-09-04 17:56:59,407 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-09-04 17:56:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:59,408 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-09-04 17:56:59,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:56:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-09-04 17:56:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 17:56:59,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:59,417 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:59,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:56:59,419 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:59,419 INFO L82 PathProgramCache]: Analyzing trace with hash 639368621, now seen corresponding path program 7 times [2020-09-04 17:56:59,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:59,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818472343] [2020-09-04 17:56:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:59,430 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:01,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:01,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818472343] [2020-09-04 17:57:01,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:01,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-09-04 17:57:01,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241566676] [2020-09-04 17:57:01,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 17:57:01,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 17:57:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:57:01,098 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 25 states. [2020-09-04 17:57:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:03,405 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-09-04 17:57:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:57:03,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-09-04 17:57:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:03,407 INFO L225 Difference]: With dead ends: 69 [2020-09-04 17:57:03,407 INFO L226 Difference]: Without dead ends: 64 [2020-09-04 17:57:03,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 17:57:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-04 17:57:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-09-04 17:57:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 17:57:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-04 17:57:03,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2020-09-04 17:57:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:03,434 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-04 17:57:03,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 17:57:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-04 17:57:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 17:57:03,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:03,436 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:03,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:57:03,436 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 692483679, now seen corresponding path program 8 times [2020-09-04 17:57:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110117479] [2020-09-04 17:57:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:03,451 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:05,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110117479] [2020-09-04 17:57:05,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:05,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-09-04 17:57:05,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352437] [2020-09-04 17:57:05,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 17:57:05,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 17:57:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:57:05,547 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 27 states. [2020-09-04 17:57:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:08,388 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-09-04 17:57:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 17:57:08,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-09-04 17:57:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:08,389 INFO L225 Difference]: With dead ends: 83 [2020-09-04 17:57:08,389 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 17:57:08,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=264, Invalid=2088, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 17:57:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 17:57:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-09-04 17:57:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 17:57:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-09-04 17:57:08,413 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 55 [2020-09-04 17:57:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:08,414 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-09-04 17:57:08,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 17:57:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-09-04 17:57:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 17:57:08,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:08,415 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:08,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:57:08,415 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash 742475281, now seen corresponding path program 9 times [2020-09-04 17:57:08,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:08,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052110553] [2020-09-04 17:57:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:08,423 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:09,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:09,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052110553] [2020-09-04 17:57:09,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:09,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 17:57:09,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94101820] [2020-09-04 17:57:09,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 17:57:09,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:09,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 17:57:09,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:57:09,690 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 16 states. [2020-09-04 17:57:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:11,841 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-09-04 17:57:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:57:11,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-09-04 17:57:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:11,843 INFO L225 Difference]: With dead ends: 80 [2020-09-04 17:57:11,843 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 17:57:11,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-09-04 17:57:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 17:57:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-09-04 17:57:11,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 17:57:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-04 17:57:11,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-09-04 17:57:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:11,871 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-04 17:57:11,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 17:57:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-04 17:57:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 17:57:11,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:11,872 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:11,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:57:11,873 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 847189346, now seen corresponding path program 10 times [2020-09-04 17:57:11,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:11,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985670433] [2020-09-04 17:57:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:11,885 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:12,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:12,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985670433] [2020-09-04 17:57:12,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:12,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:57:12,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373112394] [2020-09-04 17:57:12,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:57:12,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:57:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:57:12,134 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 11 states. [2020-09-04 17:57:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:12,851 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-09-04 17:57:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:57:12,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-04 17:57:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:12,854 INFO L225 Difference]: With dead ends: 79 [2020-09-04 17:57:12,854 INFO L226 Difference]: Without dead ends: 67 [2020-09-04 17:57:12,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:57:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-04 17:57:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-09-04 17:57:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-04 17:57:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-09-04 17:57:12,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2020-09-04 17:57:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:12,876 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-09-04 17:57:12,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:57:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-09-04 17:57:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 17:57:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:12,877 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:12,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:57:12,878 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash 148196802, now seen corresponding path program 11 times [2020-09-04 17:57:12,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:12,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603711426] [2020-09-04 17:57:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:12,888 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:15,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603711426] [2020-09-04 17:57:15,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:15,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-09-04 17:57:15,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150505531] [2020-09-04 17:57:15,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 17:57:15,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 17:57:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:57:15,096 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 29 states. [2020-09-04 17:57:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:18,403 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-04 17:57:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 17:57:18,404 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-09-04 17:57:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:18,405 INFO L225 Difference]: With dead ends: 78 [2020-09-04 17:57:18,405 INFO L226 Difference]: Without dead ends: 73 [2020-09-04 17:57:18,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 17:57:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-04 17:57:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-09-04 17:57:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-04 17:57:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-09-04 17:57:18,433 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2020-09-04 17:57:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:18,433 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-09-04 17:57:18,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 17:57:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-09-04 17:57:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-04 17:57:18,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:18,434 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:18,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:57:18,434 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028724, now seen corresponding path program 12 times [2020-09-04 17:57:18,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:18,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348624694] [2020-09-04 17:57:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:18,447 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:36,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:36,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348624694] [2020-09-04 17:57:36,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:36,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:57:36,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686235079] [2020-09-04 17:57:36,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 17:57:36,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 17:57:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=190, Unknown=8, NotChecked=0, Total=240 [2020-09-04 17:57:36,389 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2020-09-04 17:58:03,878 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0))) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 6 .cse0) (* 8589934593 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) (* 8589934592 .cse2) 1)))) (* 2 c_main_~l~0))) is different from false [2020-09-04 17:58:20,752 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2020-09-04 17:58:47,077 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification that was a NOOP. DAG size: 42 [2020-09-04 17:59:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:59:30,466 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-04 17:59:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 17:59:30,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-09-04 17:59:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:59:30,470 INFO L225 Difference]: With dead ends: 88 [2020-09-04 17:59:30,471 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 17:59:30,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=161, Invalid=748, Unknown=25, NotChecked=58, Total=992 [2020-09-04 17:59:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 17:59:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-09-04 17:59:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 17:59:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-04 17:59:30,495 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-09-04 17:59:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:59:30,495 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-04 17:59:30,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 17:59:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-04 17:59:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 17:59:30,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:59:30,496 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:59:30,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:59:30,497 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:59:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:59:30,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1720607711, now seen corresponding path program 13 times [2020-09-04 17:59:30,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:59:30,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381003292] [2020-09-04 17:59:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:59:30,508 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:59:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:59:32,802 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-09-04 17:59:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:59:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:59:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:59:33,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381003292] [2020-09-04 17:59:33,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:59:33,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-09-04 17:59:33,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238390401] [2020-09-04 17:59:33,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 17:59:33,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:59:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 17:59:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2020-09-04 17:59:33,346 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 31 states. [2020-09-04 17:59:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:59:39,494 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-09-04 17:59:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 17:59:39,495 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-09-04 17:59:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:59:39,496 INFO L225 Difference]: With dead ends: 93 [2020-09-04 17:59:39,496 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 17:59:39,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 17:59:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 17:59:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-09-04 17:59:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-04 17:59:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-09-04 17:59:39,520 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2020-09-04 17:59:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:59:39,520 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-09-04 17:59:39,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 17:59:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-09-04 17:59:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 17:59:39,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:59:39,521 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:59:39,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:59:39,522 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:59:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:59:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2133429359, now seen corresponding path program 14 times [2020-09-04 17:59:39,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:59:39,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094022607] [2020-09-04 17:59:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:59:39,538 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:59:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:59:42,257 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-09-04 17:59:42,519 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-09-04 17:59:42,771 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-09-04 17:59:42,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:59:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:59:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:59:43,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094022607] [2020-09-04 17:59:43,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:59:43,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-09-04 17:59:43,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927259453] [2020-09-04 17:59:43,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 17:59:43,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:59:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 17:59:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 17:59:43,123 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 33 states. [2020-09-04 17:59:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:59:48,321 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-09-04 17:59:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 17:59:48,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2020-09-04 17:59:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:59:48,323 INFO L225 Difference]: With dead ends: 97 [2020-09-04 17:59:48,323 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 17:59:48,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=333, Invalid=3327, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 17:59:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 17:59:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-09-04 17:59:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-04 17:59:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-09-04 17:59:48,350 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2020-09-04 17:59:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:59:48,350 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-09-04 17:59:48,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 17:59:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-09-04 17:59:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 17:59:48,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:59:48,351 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:59:48,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:59:48,352 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:59:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:59:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash 340482627, now seen corresponding path program 15 times [2020-09-04 17:59:48,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:59:48,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582645816] [2020-09-04 17:59:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:59:48,366 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:59:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:00:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:00:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:00:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:00:32,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582645816] [2020-09-04 18:00:32,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:00:32,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 18:00:32,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816059775] [2020-09-04 18:00:32,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 18:00:32,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:00:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 18:00:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=240, Unknown=19, NotChecked=0, Total=306 [2020-09-04 18:00:32,910 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 18 states. [2020-09-04 18:00:40,458 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 44 [2020-09-04 18:01:11,380 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0)))) (and (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 25769803776 .cse0) (* 36893488151714070528 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) c_main_~n~0 (* 36893488151714070528 .cse2) 8569934601)))) .cse3) (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) .cse3) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= 20000001 c_~SIZE~0) (<= c_~SIZE~0 20000001))) is different from false [2020-09-04 18:03:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:31,728 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-09-04 18:03:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 18:03:31,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-09-04 18:03:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:31,731 INFO L225 Difference]: With dead ends: 102 [2020-09-04 18:03:31,731 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 18:03:31,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 122.3s TimeCoverageRelationStatistics Valid=183, Invalid=1035, Unknown=46, NotChecked=68, Total=1332 [2020-09-04 18:03:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 18:03:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-09-04 18:03:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 18:03:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-04 18:03:31,756 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-09-04 18:03:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:31,757 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-04 18:03:31,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 18:03:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-04 18:03:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-04 18:03:31,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:31,758 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:31,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 18:03:31,758 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1270318960, now seen corresponding path program 16 times [2020-09-04 18:03:31,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:31,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123304403] [2020-09-04 18:03:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:31,764 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:34,467 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-09-04 18:03:38,859 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-09-04 18:03:41,420 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-09-04 18:03:42,106 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-09-04 18:03:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:03:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:03:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:03:42,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123304403] [2020-09-04 18:03:42,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:03:42,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-09-04 18:03:42,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506709086] [2020-09-04 18:03:42,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 18:03:42,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:03:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 18:03:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 18:03:42,792 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 35 states. [2020-09-04 18:03:49,931 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 47 [2020-09-04 18:03:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:03:53,054 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-04 18:03:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 18:03:53,058 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-09-04 18:03:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:03:53,059 INFO L225 Difference]: With dead ends: 102 [2020-09-04 18:03:53,059 INFO L226 Difference]: Without dead ends: 87 [2020-09-04 18:03:53,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=356, Invalid=3804, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 18:03:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-04 18:03:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-09-04 18:03:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-04 18:03:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-09-04 18:03:53,084 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 74 [2020-09-04 18:03:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:03:53,085 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-09-04 18:03:53,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 18:03:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-09-04 18:03:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-04 18:03:53,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:03:53,086 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:03:53,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 18:03:53,086 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:03:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:03:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1632541022, now seen corresponding path program 17 times [2020-09-04 18:03:53,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:03:53,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736450993] [2020-09-04 18:03:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:03:53,092 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:03:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:04:51,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:04:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:04:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:04:51,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736450993] [2020-09-04 18:04:51,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:04:51,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 18:04:51,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457325788] [2020-09-04 18:04:51,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 18:04:51,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:04:51,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 18:04:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=262, Unknown=27, NotChecked=0, Total=342 [2020-09-04 18:04:51,136 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-09-04 18:05:00,554 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 45 [2020-09-04 18:05:50,729 WARN L193 SmtUtils]: Spent 7.35 s on a formula simplification that was a NOOP. DAG size: 45 [2020-09-04 18:06:38,842 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-09-04 18:08:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:08:31,259 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-09-04 18:08:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 18:08:31,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-09-04 18:08:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:08:31,262 INFO L225 Difference]: With dead ends: 96 [2020-09-04 18:08:31,262 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 18:08:31,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 159.2s TimeCoverageRelationStatistics Valid=199, Invalid=1149, Unknown=58, NotChecked=0, Total=1406 [2020-09-04 18:08:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 18:08:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-09-04 18:08:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-04 18:08:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-09-04 18:08:31,293 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-09-04 18:08:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:08:31,293 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-09-04 18:08:31,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 18:08:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-09-04 18:08:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 18:08:31,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:08:31,294 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:08:31,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 18:08:31,295 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:08:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:08:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 236127985, now seen corresponding path program 18 times [2020-09-04 18:08:31,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:08:31,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269422187] [2020-09-04 18:08:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:08:31,310 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:08:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:31,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:08:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:08:31,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269422187] [2020-09-04 18:08:31,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:08:31,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 18:08:31,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762413169] [2020-09-04 18:08:31,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 18:08:31,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:08:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 18:08:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-04 18:08:31,718 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 15 states. [2020-09-04 18:08:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:08:33,210 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-09-04 18:08:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 18:08:33,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-09-04 18:08:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:08:33,212 INFO L225 Difference]: With dead ends: 98 [2020-09-04 18:08:33,213 INFO L226 Difference]: Without dead ends: 86 [2020-09-04 18:08:33,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-04 18:08:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-04 18:08:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-09-04 18:08:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 18:08:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-09-04 18:08:33,239 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-09-04 18:08:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:08:33,240 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-09-04 18:08:33,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 18:08:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-09-04 18:08:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 18:08:33,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:08:33,241 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:08:33,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 18:08:33,241 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:08:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:08:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash -462864559, now seen corresponding path program 19 times [2020-09-04 18:08:33,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:08:33,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608315982] [2020-09-04 18:08:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:08:33,249 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:08:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:36,696 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-09-04 18:08:37,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:08:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:08:37,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608315982] [2020-09-04 18:08:37,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:08:37,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-09-04 18:08:37,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583042642] [2020-09-04 18:08:37,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 18:08:37,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:08:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 18:08:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 18:08:37,396 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 37 states. [2020-09-04 18:08:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:08:44,214 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-09-04 18:08:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-04 18:08:44,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-09-04 18:08:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:08:44,223 INFO L225 Difference]: With dead ends: 97 [2020-09-04 18:08:44,224 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 18:08:44,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 18:08:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 18:08:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-09-04 18:08:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 18:08:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-04 18:08:44,254 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 79 [2020-09-04 18:08:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:08:44,255 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-04 18:08:44,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 18:08:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-04 18:08:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 18:08:44,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:08:44,256 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:08:44,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 18:08:44,256 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:08:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:08:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1777187325, now seen corresponding path program 20 times [2020-09-04 18:08:44,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:08:44,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303080481] [2020-09-04 18:08:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:08:44,269 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:08:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:47,627 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-09-04 18:08:48,079 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-09-04 18:08:49,116 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-09-04 18:08:49,458 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-09-04 18:08:49,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:08:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:08:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:08:49,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303080481] [2020-09-04 18:08:49,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:08:49,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-09-04 18:08:49,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737241696] [2020-09-04 18:08:49,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 18:08:49,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:08:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 18:08:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 18:08:49,921 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 39 states. [2020-09-04 18:08:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 18:08:58,115 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-04 18:08:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 18:08:58,117 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-09-04 18:08:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 18:08:58,118 INFO L225 Difference]: With dead ends: 111 [2020-09-04 18:08:58,119 INFO L226 Difference]: Without dead ends: 96 [2020-09-04 18:08:58,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=402, Invalid=4854, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 18:08:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-04 18:08:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-09-04 18:08:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-04 18:08:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-09-04 18:08:58,149 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-09-04 18:08:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 18:08:58,149 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-09-04 18:08:58,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 18:08:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-09-04 18:08:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 18:08:58,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 18:08:58,150 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 18:08:58,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 18:08:58,151 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 18:08:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 18:08:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1449876555, now seen corresponding path program 21 times [2020-09-04 18:08:58,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 18:08:58,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339798196] [2020-09-04 18:08:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 18:08:58,158 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 18:08:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:10:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 18:10:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 18:10:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 18:10:19,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339798196] [2020-09-04 18:10:19,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 18:10:19,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-04 18:10:19,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886467878] [2020-09-04 18:10:19,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 18:10:19,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 18:10:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 18:10:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=325, Unknown=37, NotChecked=0, Total=420 [2020-09-04 18:10:19,998 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 21 states.