/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:15:55,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:55,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:55,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:55,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:55,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:55,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:55,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:15:55,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:55,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:55,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:55,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:55,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:55,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:55,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:55,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:55,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:55,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:55,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:55,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:55,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:55,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:55,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:55,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:55,723 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:55,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:55,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:55,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:55,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:55,975 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:55,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2021-05-02 23:15:56,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4483a95/34ddbbd46a814f7aba9cdff110891e3a/FLAG92557de5c [2021-05-02 23:15:56,391 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:56,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2021-05-02 23:15:56,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4483a95/34ddbbd46a814f7aba9cdff110891e3a/FLAG92557de5c [2021-05-02 23:15:56,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4483a95/34ddbbd46a814f7aba9cdff110891e3a [2021-05-02 23:15:56,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:56,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:56,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:56,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:56,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:56,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5319e941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56, skipping insertion in model container [2021-05-02 23:15:56,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:56,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:56,549 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2021-05-02 23:15:56,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:56,611 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:56,623 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2021-05-02 23:15:56,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:56,657 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:56,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56 WrapperNode [2021-05-02 23:15:56,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:56,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:56,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:56,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:56,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... [2021-05-02 23:15:56,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:56,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:56,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:56,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:56,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:56,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:15:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:15:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:15:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-05-02 23:15:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:57,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:57,012 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-02 23:15:57,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:57 BoogieIcfgContainer [2021-05-02 23:15:57,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:57,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:57,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:57,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:57,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:56" (1/3) ... [2021-05-02 23:15:57,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7e6140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:57, skipping insertion in model container [2021-05-02 23:15:57,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:56" (2/3) ... [2021-05-02 23:15:57,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7e6140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:57, skipping insertion in model container [2021-05-02 23:15:57,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:57" (3/3) ... [2021-05-02 23:15:57,019 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2021-05-02 23:15:57,022 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:57,024 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:57,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:57,068 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:57,068 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:57,069 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:57,069 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:57,069 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:57,069 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:57,069 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:57,069 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:15:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:15:57,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:57,088 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:57,088 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2021-05-02 23:15:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:57,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423477253] [2021-05-02 23:15:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:57,156 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:57,343 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:57,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423477253] [2021-05-02 23:15:57,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423477253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:57,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:57,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:15:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820876933] [2021-05-02 23:15:57,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:15:57,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:57,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:15:57,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:57,357 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:57,439 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2021-05-02 23:15:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:15:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:15:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:57,444 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:15:57,444 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:15:57,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:15:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 23:15:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-05-02 23:15:57,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2021-05-02 23:15:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:57,484 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-05-02 23:15:57,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-05-02 23:15:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:15:57,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:57,489 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:57,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:57,489 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2021-05-02 23:15:57,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:57,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498630572] [2021-05-02 23:15:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:57,492 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:57,561 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:57,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498630572] [2021-05-02 23:15:57,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [498630572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:57,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:57,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:15:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313803341] [2021-05-02 23:15:57,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:15:57,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:15:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:57,564 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:57,658 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-05-02 23:15:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:15:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:15:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:57,663 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:15:57,663 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:15:57,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:15:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-05-02 23:15:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-05-02 23:15:57,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2021-05-02 23:15:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:57,676 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-05-02 23:15:57,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-05-02 23:15:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:15:57,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:57,679 INFO L523 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] [2021-05-02 23:15:57,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:57,679 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2021-05-02 23:15:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:57,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291707777] [2021-05-02 23:15:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:57,696 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:57,700 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:57,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291707777] [2021-05-02 23:15:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [291707777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:57,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:57,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:15:57,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373509156] [2021-05-02 23:15:57,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:15:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:15:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:57,786 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:57,898 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-05-02 23:15:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:15:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:15:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:57,900 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:15:57,901 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:15:57,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:15:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-05-02 23:15:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 23:15:57,913 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2021-05-02 23:15:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:57,913 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 23:15:57,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 23:15:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:15:57,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:57,914 INFO L523 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] [2021-05-02 23:15:57,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:15:57,914 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2021-05-02 23:15:57,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:57,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339467386] [2021-05-02 23:15:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:57,923 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:57,925 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:58,046 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339467386] [2021-05-02 23:15:58,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [339467386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:58,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:58,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:15:58,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040175559] [2021-05-02 23:15:58,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:15:58,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:15:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:15:58,049 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:58,228 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2021-05-02 23:15:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:15:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:15:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:58,231 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:15:58,232 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:15:58,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:15:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:15:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2021-05-02 23:15:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 23:15:58,242 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2021-05-02 23:15:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:58,242 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 23:15:58,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 23:15:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:15:58,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:58,243 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:58,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:15:58,243 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2021-05-02 23:15:58,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:58,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049124934] [2021-05-02 23:15:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:58,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:58,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:58,368 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:58,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049124934] [2021-05-02 23:15:58,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049124934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:58,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:58,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:15:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92441531] [2021-05-02 23:15:58,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:15:58,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:15:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:15:58,370 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:58,598 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2021-05-02 23:15:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:15:58,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:15:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:58,600 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:15:58,600 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 23:15:58,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:15:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 23:15:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2021-05-02 23:15:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 23:15:58,606 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2021-05-02 23:15:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:58,606 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 23:15:58,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 23:15:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:15:58,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:58,607 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:58,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:15:58,607 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2021-05-02 23:15:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:58,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718612354] [2021-05-02 23:15:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:58,614 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:58,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:58,778 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:58,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718612354] [2021-05-02 23:15:58,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [718612354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:58,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:58,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:15:58,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358969676] [2021-05-02 23:15:58,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:15:58,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:58,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:15:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:15:58,781 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,015 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2021-05-02 23:15:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:15:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 23:15:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,017 INFO L225 Difference]: With dead ends: 127 [2021-05-02 23:15:59,017 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:15:59,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:15:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:15:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2021-05-02 23:15:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 23:15:59,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2021-05-02 23:15:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,033 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 23:15:59,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 23:15:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:15:59,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,034 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:59,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:15:59,034 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2021-05-02 23:15:59,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398710054] [2021-05-02 23:15:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,041 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:59,042 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398710054] [2021-05-02 23:15:59,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [398710054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:15:59,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328016906] [2021-05-02 23:15:59,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:15:59,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:15:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:15:59,191 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,300 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-02 23:15:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:15:59,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:15:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,302 INFO L225 Difference]: With dead ends: 63 [2021-05-02 23:15:59,302 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:15:59,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:15:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:15:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-05-02 23:15:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-05-02 23:15:59,318 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2021-05-02 23:15:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,320 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-05-02 23:15:59,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-05-02 23:15:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:15:59,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,324 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:59,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:15:59,325 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2021-05-02 23:15:59,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327968982] [2021-05-02 23:15:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,333 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:59,336 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,418 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327968982] [2021-05-02 23:15:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [327968982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:15:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766295223] [2021-05-02 23:15:59,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:15:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:15:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:59,421 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,479 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2021-05-02 23:15:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:15:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:15:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,481 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:15:59,481 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:15:59,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:15:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-05-02 23:15:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2021-05-02 23:15:59,495 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2021-05-02 23:15:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,496 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2021-05-02 23:15:59,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2021-05-02 23:15:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:15:59,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,499 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-05-02 23:15:59,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:15:59,499 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2021-05-02 23:15:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629830317] [2021-05-02 23:15:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,509 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:59,511 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,597 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629830317] [2021-05-02 23:15:59,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [629830317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:15:59,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614110359] [2021-05-02 23:15:59,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:15:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:15:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:59,601 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,657 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2021-05-02 23:15:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:15:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:15:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,658 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:15:59,658 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:15:59,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:15:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-05-02 23:15:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-02 23:15:59,664 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2021-05-02 23:15:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,664 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-02 23:15:59,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-02 23:15:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:15:59,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,665 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-05-02 23:15:59,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:15:59,665 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2021-05-02 23:15:59,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500258053] [2021-05-02 23:15:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,670 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:59,671 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,162 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500258053] [2021-05-02 23:16:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500258053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:00,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255677447] [2021-05-02 23:16:00,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:00,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:00,163 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,264 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2021-05-02 23:16:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:00,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:16:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,265 INFO L225 Difference]: With dead ends: 99 [2021-05-02 23:16:00,265 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:16:00,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:16:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 23:16:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-05-02 23:16:00,270 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 40 [2021-05-02 23:16:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,270 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-05-02 23:16:00,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-05-02 23:16:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:16:00,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,271 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-05-02 23:16:00,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:00,272 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2021-05-02 23:16:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111026747] [2021-05-02 23:16:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,277 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,278 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,500 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111026747] [2021-05-02 23:16:00,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [111026747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:00,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560421000] [2021-05-02 23:16:00,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:00,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:00,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:00,502 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,609 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2021-05-02 23:16:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:16:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,610 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:00,610 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:16:00,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:16:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 71. [2021-05-02 23:16:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-05-02 23:16:00,617 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 41 [2021-05-02 23:16:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,617 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-05-02 23:16:00,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-05-02 23:16:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:00,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,618 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-05-02 23:16:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:00,618 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 1 times [2021-05-02 23:16:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524645506] [2021-05-02 23:16:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,623 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,706 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524645506] [2021-05-02 23:16:00,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524645506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:00,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121411432] [2021-05-02 23:16:00,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:00,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:00,707 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,848 INFO L93 Difference]: Finished difference Result 255 states and 333 transitions. [2021-05-02 23:16:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:16:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,850 INFO L225 Difference]: With dead ends: 255 [2021-05-02 23:16:00,850 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 23:16:00,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 23:16:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 77. [2021-05-02 23:16:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-05-02 23:16:00,861 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 42 [2021-05-02 23:16:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,861 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-05-02 23:16:00,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-05-02 23:16:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:00,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,862 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-05-02 23:16:00,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:00,862 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 2 times [2021-05-02 23:16:00,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642663474] [2021-05-02 23:16:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,870 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,974 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642663474] [2021-05-02 23:16:00,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [642663474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497743244] [2021-05-02 23:16:00,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:00,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:00,976 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:01,198 INFO L93 Difference]: Finished difference Result 349 states and 459 transitions. [2021-05-02 23:16:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 23:16:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:01,200 INFO L225 Difference]: With dead ends: 349 [2021-05-02 23:16:01,200 INFO L226 Difference]: Without dead ends: 323 [2021-05-02 23:16:01,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-02 23:16:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 81. [2021-05-02 23:16:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 76 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-05-02 23:16:01,230 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 46 [2021-05-02 23:16:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:01,230 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-05-02 23:16:01,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-05-02 23:16:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:01,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:01,231 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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] [2021-05-02 23:16:01,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:01,231 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 3 times [2021-05-02 23:16:01,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:01,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890425065] [2021-05-02 23:16:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:01,238 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:01,240 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:01,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:01,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890425065] [2021-05-02 23:16:01,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890425065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:01,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:01,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370257949] [2021-05-02 23:16:01,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:01,364 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:01,645 INFO L93 Difference]: Finished difference Result 364 states and 478 transitions. [2021-05-02 23:16:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:16:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:01,647 INFO L225 Difference]: With dead ends: 364 [2021-05-02 23:16:01,647 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 23:16:01,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 23:16:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 83. [2021-05-02 23:16:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 78 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-05-02 23:16:01,660 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 50 [2021-05-02 23:16:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:01,660 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-05-02 23:16:01,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-05-02 23:16:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:01,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:01,661 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:01,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:01,661 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 1 times [2021-05-02 23:16:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:01,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141393137] [2021-05-02 23:16:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:01,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:01,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:01,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:01,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141393137] [2021-05-02 23:16:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141393137] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:01,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:01,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:01,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475820656] [2021-05-02 23:16:01,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:01,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:01,830 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:02,129 INFO L93 Difference]: Finished difference Result 199 states and 259 transitions. [2021-05-02 23:16:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:02,130 INFO L225 Difference]: With dead ends: 199 [2021-05-02 23:16:02,130 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:16:02,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:16:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 127. [2021-05-02 23:16:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 122 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2021-05-02 23:16:02,154 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 51 [2021-05-02 23:16:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:02,155 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2021-05-02 23:16:02,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2021-05-02 23:16:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:02,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:02,156 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:02,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:02,156 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2021-05-02 23:16:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:02,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693885668] [2021-05-02 23:16:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:02,161 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:02,162 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:02,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:02,665 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:02,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693885668] [2021-05-02 23:16:02,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [693885668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:02,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:02,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:02,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089703503] [2021-05-02 23:16:02,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:02,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:02,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:02,666 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:03,227 INFO L93 Difference]: Finished difference Result 208 states and 270 transitions. [2021-05-02 23:16:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:03,229 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:16:03,229 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:16:03,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:16:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-05-02 23:16:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.2900763358778626) internal successors, (169), 131 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2021-05-02 23:16:03,261 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 51 [2021-05-02 23:16:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:03,261 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2021-05-02 23:16:03,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2021-05-02 23:16:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:03,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:03,262 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:03,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:03,262 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:03,263 INFO L82 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 1 times [2021-05-02 23:16:03,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443437161] [2021-05-02 23:16:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:03,270 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:03,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,716 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2021-05-02 23:16:03,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:03,754 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:03,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443437161] [2021-05-02 23:16:03,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [443437161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:03,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:03,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:03,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311068675] [2021-05-02 23:16:03,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:03,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:03,755 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,130 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2021-05-02 23:16:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,131 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:16:04,131 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 23:16:04,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 23:16:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2021-05-02 23:16:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.2714285714285714) internal successors, (178), 140 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-02 23:16:04,162 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 51 [2021-05-02 23:16:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,162 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-02 23:16:04,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-02 23:16:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:04,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,163 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:04,163 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2021-05-02 23:16:04,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637522459] [2021-05-02 23:16:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,169 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,170 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,660 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 29 [2021-05-02 23:16:04,941 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2021-05-02 23:16:05,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:05,157 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:05,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637522459] [2021-05-02 23:16:05,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [637522459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:05,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:05,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:05,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179341403] [2021-05-02 23:16:05,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:05,159 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:05,416 INFO L93 Difference]: Finished difference Result 385 states and 496 transitions. [2021-05-02 23:16:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:05,418 INFO L225 Difference]: With dead ends: 385 [2021-05-02 23:16:05,418 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 23:16:05,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 23:16:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 199. [2021-05-02 23:16:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.268041237113402) internal successors, (246), 194 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2021-05-02 23:16:05,467 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 51 [2021-05-02 23:16:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:05,467 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2021-05-02 23:16:05,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2021-05-02 23:16:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:05,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:05,469 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:05,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:05,469 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:05,470 INFO L82 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 2 times [2021-05-02 23:16:05,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:05,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632399658] [2021-05-02 23:16:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:05,477 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:05,479 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,518 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 47 [2021-05-02 23:16:06,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:06,605 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:06,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632399658] [2021-05-02 23:16:06,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632399658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:06,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:06,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645248130] [2021-05-02 23:16:06,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:06,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:06,607 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:07,030 INFO L93 Difference]: Finished difference Result 505 states and 652 transitions. [2021-05-02 23:16:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:07,032 INFO L225 Difference]: With dead ends: 505 [2021-05-02 23:16:07,032 INFO L226 Difference]: Without dead ends: 400 [2021-05-02 23:16:07,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-02 23:16:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 273. [2021-05-02 23:16:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.2649253731343284) internal successors, (339), 268 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 343 transitions. [2021-05-02 23:16:07,093 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 343 transitions. Word has length 51 [2021-05-02 23:16:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:07,093 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 343 transitions. [2021-05-02 23:16:07,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 343 transitions. [2021-05-02 23:16:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:07,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,094 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:07,095 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,095 INFO L82 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2021-05-02 23:16:07,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070774924] [2021-05-02 23:16:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:07,102 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:07,104 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:07,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:07,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070774924] [2021-05-02 23:16:07,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070774924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:07,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:07,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:07,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253478372] [2021-05-02 23:16:07,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:07,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:07,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:07,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:07,970 INFO L87 Difference]: Start difference. First operand 273 states and 343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:08,205 INFO L93 Difference]: Finished difference Result 447 states and 571 transitions. [2021-05-02 23:16:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:08,207 INFO L225 Difference]: With dead ends: 447 [2021-05-02 23:16:08,207 INFO L226 Difference]: Without dead ends: 403 [2021-05-02 23:16:08,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-05-02 23:16:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 284. [2021-05-02 23:16:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2544802867383513) internal successors, (350), 279 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 354 transitions. [2021-05-02 23:16:08,256 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 354 transitions. Word has length 51 [2021-05-02 23:16:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:08,256 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 354 transitions. [2021-05-02 23:16:08,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 354 transitions. [2021-05-02 23:16:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:08,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:08,260 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:08,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:08,261 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2021-05-02 23:16:08,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:08,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191125794] [2021-05-02 23:16:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:08,265 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:08,266 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,968 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 55 [2021-05-02 23:16:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:09,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191125794] [2021-05-02 23:16:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191125794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:09,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640997697] [2021-05-02 23:16:09,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:09,052 INFO L87 Difference]: Start difference. First operand 284 states and 354 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:09,402 INFO L93 Difference]: Finished difference Result 523 states and 656 transitions. [2021-05-02 23:16:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:09,404 INFO L225 Difference]: With dead ends: 523 [2021-05-02 23:16:09,404 INFO L226 Difference]: Without dead ends: 390 [2021-05-02 23:16:09,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-02 23:16:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 309. [2021-05-02 23:16:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.2532894736842106) internal successors, (381), 304 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 385 transitions. [2021-05-02 23:16:09,463 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 385 transitions. Word has length 51 [2021-05-02 23:16:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:09,463 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 385 transitions. [2021-05-02 23:16:09,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 385 transitions. [2021-05-02 23:16:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:16:09,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:09,464 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 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] [2021-05-02 23:16:09,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:09,464 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 1 times [2021-05-02 23:16:09,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:09,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001859142] [2021-05-02 23:16:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,469 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:09,470 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:09,597 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001859142] [2021-05-02 23:16:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001859142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469727740] [2021-05-02 23:16:09,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:09,598 INFO L87 Difference]: Start difference. First operand 309 states and 385 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,303 INFO L93 Difference]: Finished difference Result 2241 states and 2810 transitions. [2021-05-02 23:16:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 23:16:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,310 INFO L225 Difference]: With dead ends: 2241 [2021-05-02 23:16:10,310 INFO L226 Difference]: Without dead ends: 2212 [2021-05-02 23:16:10,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-05-02 23:16:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 313. [2021-05-02 23:16:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.2564935064935066) internal successors, (387), 308 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 391 transitions. [2021-05-02 23:16:10,414 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 391 transitions. Word has length 52 [2021-05-02 23:16:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,415 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 391 transitions. [2021-05-02 23:16:10,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 391 transitions. [2021-05-02 23:16:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:10,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,416 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:10,416 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 1 times [2021-05-02 23:16:10,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21502483] [2021-05-02 23:16:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,421 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,422 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:10,483 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21502483] [2021-05-02 23:16:10,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [21502483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:10,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331400516] [2021-05-02 23:16:10,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:10,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:10,484 INFO L87 Difference]: Start difference. First operand 313 states and 391 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,611 INFO L93 Difference]: Finished difference Result 570 states and 711 transitions. [2021-05-02 23:16:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:16:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,613 INFO L225 Difference]: With dead ends: 570 [2021-05-02 23:16:10,613 INFO L226 Difference]: Without dead ends: 308 [2021-05-02 23:16:10,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-02 23:16:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 277. [2021-05-02 23:16:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.1948529411764706) internal successors, (325), 272 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 329 transitions. [2021-05-02 23:16:10,668 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 329 transitions. Word has length 54 [2021-05-02 23:16:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,668 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 329 transitions. [2021-05-02 23:16:10,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 329 transitions. [2021-05-02 23:16:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:16:10,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,669 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 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] [2021-05-02 23:16:10,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:10,669 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 2 times [2021-05-02 23:16:10,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392967440] [2021-05-02 23:16:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,675 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,676 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:10,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392967440] [2021-05-02 23:16:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392967440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157661440] [2021-05-02 23:16:10,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:10,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:10,823 INFO L87 Difference]: Start difference. First operand 277 states and 329 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,749 INFO L93 Difference]: Finished difference Result 2465 states and 2912 transitions. [2021-05-02 23:16:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 23:16:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,757 INFO L225 Difference]: With dead ends: 2465 [2021-05-02 23:16:11,757 INFO L226 Difference]: Without dead ends: 2436 [2021-05-02 23:16:11,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-02 23:16:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 281. [2021-05-02 23:16:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.1992753623188406) internal successors, (331), 276 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 335 transitions. [2021-05-02 23:16:11,836 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 335 transitions. Word has length 56 [2021-05-02 23:16:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:11,836 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 335 transitions. [2021-05-02 23:16:11,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 335 transitions. [2021-05-02 23:16:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:11,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,837 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:11,838 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 2 times [2021-05-02 23:16:11,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172506800] [2021-05-02 23:16:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,842 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:11,844 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:11,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172506800] [2021-05-02 23:16:11,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172506800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344328508] [2021-05-02 23:16:11,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:11,977 INFO L87 Difference]: Start difference. First operand 281 states and 335 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,165 INFO L93 Difference]: Finished difference Result 594 states and 700 transitions. [2021-05-02 23:16:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:16:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,167 INFO L225 Difference]: With dead ends: 594 [2021-05-02 23:16:12,167 INFO L226 Difference]: Without dead ends: 367 [2021-05-02 23:16:12,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-02 23:16:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 303. [2021-05-02 23:16:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.191275167785235) internal successors, (355), 298 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 359 transitions. [2021-05-02 23:16:12,239 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 359 transitions. Word has length 60 [2021-05-02 23:16:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,239 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 359 transitions. [2021-05-02 23:16:12,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 359 transitions. [2021-05-02 23:16:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:12,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,240 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 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] [2021-05-02 23:16:12,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:12,240 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 3 times [2021-05-02 23:16:12,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326995694] [2021-05-02 23:16:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,247 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,248 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,441 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326995694] [2021-05-02 23:16:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326995694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008940249] [2021-05-02 23:16:12,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:12,442 INFO L87 Difference]: Start difference. First operand 303 states and 359 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,655 INFO L93 Difference]: Finished difference Result 2769 states and 3268 transitions. [2021-05-02 23:16:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:16:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,662 INFO L225 Difference]: With dead ends: 2769 [2021-05-02 23:16:13,662 INFO L226 Difference]: Without dead ends: 2740 [2021-05-02 23:16:13,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-05-02 23:16:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 307. [2021-05-02 23:16:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.195364238410596) internal successors, (361), 302 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 365 transitions. [2021-05-02 23:16:13,752 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 365 transitions. Word has length 60 [2021-05-02 23:16:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,752 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 365 transitions. [2021-05-02 23:16:13,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 365 transitions. [2021-05-02 23:16:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:16:13,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,753 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:13,754 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 3 times [2021-05-02 23:16:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421495763] [2021-05-02 23:16:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,759 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,760 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421495763] [2021-05-02 23:16:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [421495763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:14,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735654778] [2021-05-02 23:16:14,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:14,071 INFO L87 Difference]: Start difference. First operand 307 states and 365 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,412 INFO L93 Difference]: Finished difference Result 361 states and 423 transitions. [2021-05-02 23:16:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 23:16:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,413 INFO L225 Difference]: With dead ends: 361 [2021-05-02 23:16:14,413 INFO L226 Difference]: Without dead ends: 285 [2021-05-02 23:16:14,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-02 23:16:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-05-02 23:16:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.2) internal successors, (336), 280 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 340 transitions. [2021-05-02 23:16:14,483 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 340 transitions. Word has length 61 [2021-05-02 23:16:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 340 transitions. [2021-05-02 23:16:14,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 340 transitions. [2021-05-02 23:16:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:14,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,484 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:14,485 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 4 times [2021-05-02 23:16:14,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104383401] [2021-05-02 23:16:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,488 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,489 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,735 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104383401] [2021-05-02 23:16:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104383401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:14,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280366501] [2021-05-02 23:16:14,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:14,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:14,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:14,737 INFO L87 Difference]: Start difference. First operand 285 states and 340 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,046 INFO L93 Difference]: Finished difference Result 424 states and 500 transitions. [2021-05-02 23:16:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 23:16:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,048 INFO L225 Difference]: With dead ends: 424 [2021-05-02 23:16:15,048 INFO L226 Difference]: Without dead ends: 419 [2021-05-02 23:16:15,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-02 23:16:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 313. [2021-05-02 23:16:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.1883116883116882) internal successors, (366), 308 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2021-05-02 23:16:15,149 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 62 [2021-05-02 23:16:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,149 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2021-05-02 23:16:15,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2021-05-02 23:16:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:16:15,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,150 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:15,150 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 5 times [2021-05-02 23:16:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883752580] [2021-05-02 23:16:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,157 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,158 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883752580] [2021-05-02 23:16:15,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [883752580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:15,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516139621] [2021-05-02 23:16:15,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:15,250 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,572 INFO L93 Difference]: Finished difference Result 719 states and 840 transitions. [2021-05-02 23:16:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:16:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,575 INFO L225 Difference]: With dead ends: 719 [2021-05-02 23:16:15,575 INFO L226 Difference]: Without dead ends: 670 [2021-05-02 23:16:15,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-05-02 23:16:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 335. [2021-05-02 23:16:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.1818181818181819) internal successors, (390), 330 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2021-05-02 23:16:15,667 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 63 [2021-05-02 23:16:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,667 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2021-05-02 23:16:15,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2021-05-02 23:16:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:16:15,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,668 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:15,668 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 6 times [2021-05-02 23:16:15,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109743344] [2021-05-02 23:16:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,671 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,672 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109743344] [2021-05-02 23:16:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [109743344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398460508] [2021-05-02 23:16:15,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:15,774 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,268 INFO L93 Difference]: Finished difference Result 991 states and 1155 transitions. [2021-05-02 23:16:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:16:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,271 INFO L225 Difference]: With dead ends: 991 [2021-05-02 23:16:16,271 INFO L226 Difference]: Without dead ends: 942 [2021-05-02 23:16:16,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-02 23:16:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 335. [2021-05-02 23:16:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.1818181818181819) internal successors, (390), 330 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2021-05-02 23:16:16,373 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 65 [2021-05-02 23:16:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,374 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2021-05-02 23:16:16,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2021-05-02 23:16:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:16:16,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,375 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:16,375 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 7 times [2021-05-02 23:16:16,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337752372] [2021-05-02 23:16:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,379 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,381 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337752372] [2021-05-02 23:16:16,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337752372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:16,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828399057] [2021-05-02 23:16:16,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:16,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:16,509 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,141 INFO L93 Difference]: Finished difference Result 1257 states and 1464 transitions. [2021-05-02 23:16:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 23:16:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,144 INFO L225 Difference]: With dead ends: 1257 [2021-05-02 23:16:17,144 INFO L226 Difference]: Without dead ends: 1208 [2021-05-02 23:16:17,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-05-02 23:16:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 335. [2021-05-02 23:16:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.1818181818181819) internal successors, (390), 330 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2021-05-02 23:16:17,249 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 67 [2021-05-02 23:16:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,249 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2021-05-02 23:16:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2021-05-02 23:16:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:16:17,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,250 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:17,250 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 8 times [2021-05-02 23:16:17,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039576694] [2021-05-02 23:16:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,254 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,255 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,404 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039576694] [2021-05-02 23:16:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039576694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:17,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327683217] [2021-05-02 23:16:17,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:17,406 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,205 INFO L93 Difference]: Finished difference Result 1523 states and 1773 transitions. [2021-05-02 23:16:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:18,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 23:16:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,209 INFO L225 Difference]: With dead ends: 1523 [2021-05-02 23:16:18,209 INFO L226 Difference]: Without dead ends: 1474 [2021-05-02 23:16:18,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-05-02 23:16:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 335. [2021-05-02 23:16:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.1818181818181819) internal successors, (390), 330 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2021-05-02 23:16:18,318 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 69 [2021-05-02 23:16:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,318 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2021-05-02 23:16:18,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2021-05-02 23:16:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:16:18,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,319 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:18,320 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 9 times [2021-05-02 23:16:18,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487909938] [2021-05-02 23:16:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,325 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,326 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487909938] [2021-05-02 23:16:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [487909938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:18,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280162115] [2021-05-02 23:16:18,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:18,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:18,470 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,461 INFO L93 Difference]: Finished difference Result 1789 states and 2082 transitions. [2021-05-02 23:16:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 23:16:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,466 INFO L225 Difference]: With dead ends: 1789 [2021-05-02 23:16:19,466 INFO L226 Difference]: Without dead ends: 1740 [2021-05-02 23:16:19,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-05-02 23:16:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 335. [2021-05-02 23:16:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.1818181818181819) internal successors, (390), 330 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 394 transitions. [2021-05-02 23:16:19,581 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 394 transitions. Word has length 71 [2021-05-02 23:16:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,581 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 394 transitions. [2021-05-02 23:16:19,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 394 transitions. [2021-05-02 23:16:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:19,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,582 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:19,582 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 10 times [2021-05-02 23:16:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921802331] [2021-05-02 23:16:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,586 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,587 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,509 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-05-02 23:16:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921802331] [2021-05-02 23:16:20,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921802331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:20,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076377287] [2021-05-02 23:16:20,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:20,646 INFO L87 Difference]: Start difference. First operand 335 states and 394 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,751 INFO L93 Difference]: Finished difference Result 1103 states and 1283 transitions. [2021-05-02 23:16:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,754 INFO L225 Difference]: With dead ends: 1103 [2021-05-02 23:16:21,754 INFO L226 Difference]: Without dead ends: 909 [2021-05-02 23:16:21,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1241.5ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-05-02 23:16:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 487. [2021-05-02 23:16:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 482 states have (on average 1.1493775933609958) internal successors, (554), 482 states have internal predecessors, (554), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2021-05-02 23:16:21,926 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 72 [2021-05-02 23:16:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,926 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2021-05-02 23:16:21,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2021-05-02 23:16:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:21,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,927 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:21,927 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 11 times [2021-05-02 23:16:21,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385900501] [2021-05-02 23:16:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,931 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,932 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,808 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-05-02 23:16:22,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,853 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385900501] [2021-05-02 23:16:22,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [385900501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:22,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745020373] [2021-05-02 23:16:22,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:22,854 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,743 INFO L93 Difference]: Finished difference Result 870 states and 1003 transitions. [2021-05-02 23:16:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,746 INFO L225 Difference]: With dead ends: 870 [2021-05-02 23:16:23,746 INFO L226 Difference]: Without dead ends: 807 [2021-05-02 23:16:23,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-05-02 23:16:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 662. [2021-05-02 23:16:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 657 states have (on average 1.1552511415525115) internal successors, (759), 657 states have internal predecessors, (759), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 763 transitions. [2021-05-02 23:16:23,995 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 763 transitions. Word has length 72 [2021-05-02 23:16:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,995 INFO L480 AbstractCegarLoop]: Abstraction has 662 states and 763 transitions. [2021-05-02 23:16:23,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 763 transitions. [2021-05-02 23:16:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:23,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,997 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:23,997 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 12 times [2021-05-02 23:16:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582664028] [2021-05-02 23:16:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,001 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,002 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,303 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-05-02 23:16:24,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,967 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582664028] [2021-05-02 23:16:24,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582664028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:24,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461610314] [2021-05-02 23:16:24,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:24,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:24,969 INFO L87 Difference]: Start difference. First operand 662 states and 763 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,391 INFO L93 Difference]: Finished difference Result 1402 states and 1611 transitions. [2021-05-02 23:16:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:26,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,394 INFO L225 Difference]: With dead ends: 1402 [2021-05-02 23:16:26,394 INFO L226 Difference]: Without dead ends: 1358 [2021-05-02 23:16:26,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1295.5ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-05-02 23:16:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 909. [2021-05-02 23:16:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 904 states have (on average 1.157079646017699) internal successors, (1046), 904 states have internal predecessors, (1046), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1050 transitions. [2021-05-02 23:16:26,759 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1050 transitions. Word has length 72 [2021-05-02 23:16:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,759 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 1050 transitions. [2021-05-02 23:16:26,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1050 transitions. [2021-05-02 23:16:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:26,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,760 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:26,761 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 13 times [2021-05-02 23:16:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793697475] [2021-05-02 23:16:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,764 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,765 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,209 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-05-02 23:16:28,046 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 60 [2021-05-02 23:16:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,185 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793697475] [2021-05-02 23:16:28,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [793697475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:28,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927941110] [2021-05-02 23:16:28,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:28,187 INFO L87 Difference]: Start difference. First operand 909 states and 1050 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,678 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-05-02 23:16:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,963 INFO L93 Difference]: Finished difference Result 1541 states and 1756 transitions. [2021-05-02 23:16:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,966 INFO L225 Difference]: With dead ends: 1541 [2021-05-02 23:16:29,967 INFO L226 Difference]: Without dead ends: 1420 [2021-05-02 23:16:29,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1892.4ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-05-02 23:16:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1151. [2021-05-02 23:16:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1146 states have (on average 1.1457242582897034) internal successors, (1313), 1146 states have internal predecessors, (1313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1317 transitions. [2021-05-02 23:16:30,435 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1317 transitions. Word has length 72 [2021-05-02 23:16:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,435 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 1317 transitions. [2021-05-02 23:16:30,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1317 transitions. [2021-05-02 23:16:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:16:30,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,437 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:30,437 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 14 times [2021-05-02 23:16:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078325745] [2021-05-02 23:16:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,441 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,442 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,607 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078325745] [2021-05-02 23:16:30,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078325745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728254542] [2021-05-02 23:16:30,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:30,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:30,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:30,608 INFO L87 Difference]: Start difference. First operand 1151 states and 1317 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,532 INFO L93 Difference]: Finished difference Result 3566 states and 4106 transitions. [2021-05-02 23:16:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 23:16:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,540 INFO L225 Difference]: With dead ends: 3566 [2021-05-02 23:16:32,540 INFO L226 Difference]: Without dead ends: 3517 [2021-05-02 23:16:32,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-05-02 23:16:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 1151. [2021-05-02 23:16:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1146 states have (on average 1.1457242582897034) internal successors, (1313), 1146 states have internal predecessors, (1313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1317 transitions. [2021-05-02 23:16:33,032 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1317 transitions. Word has length 73 [2021-05-02 23:16:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,032 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 1317 transitions. [2021-05-02 23:16:33,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1317 transitions. [2021-05-02 23:16:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:33,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,034 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:33,034 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 15 times [2021-05-02 23:16:33,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008840337] [2021-05-02 23:16:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,038 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,039 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,156 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008840337] [2021-05-02 23:16:33,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008840337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:33,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128832342] [2021-05-02 23:16:33,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:33,157 INFO L87 Difference]: Start difference. First operand 1151 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,307 INFO L93 Difference]: Finished difference Result 2095 states and 2395 transitions. [2021-05-02 23:16:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,312 INFO L225 Difference]: With dead ends: 2095 [2021-05-02 23:16:34,312 INFO L226 Difference]: Without dead ends: 1986 [2021-05-02 23:16:34,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-05-02 23:16:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1233. [2021-05-02 23:16:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1228 states have (on average 1.1425081433224755) internal successors, (1403), 1228 states have internal predecessors, (1403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1407 transitions. [2021-05-02 23:16:34,830 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1407 transitions. Word has length 74 [2021-05-02 23:16:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,830 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 1407 transitions. [2021-05-02 23:16:34,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1407 transitions. [2021-05-02 23:16:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:34,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,832 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:34,832 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1752054978, now seen corresponding path program 4 times [2021-05-02 23:16:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410451250] [2021-05-02 23:16:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,836 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,837 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410451250] [2021-05-02 23:16:35,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [410451250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:35,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94612233] [2021-05-02 23:16:35,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:35,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:35,054 INFO L87 Difference]: Start difference. First operand 1233 states and 1407 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,468 INFO L93 Difference]: Finished difference Result 6103 states and 7076 transitions. [2021-05-02 23:16:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,480 INFO L225 Difference]: With dead ends: 6103 [2021-05-02 23:16:38,480 INFO L226 Difference]: Without dead ends: 6059 [2021-05-02 23:16:38,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-05-02 23:16:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 1237. [2021-05-02 23:16:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 1.1436688311688312) internal successors, (1409), 1232 states have internal predecessors, (1409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1413 transitions. [2021-05-02 23:16:39,105 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1413 transitions. Word has length 74 [2021-05-02 23:16:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,105 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 1413 transitions. [2021-05-02 23:16:39,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1413 transitions. [2021-05-02 23:16:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:16:39,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,106 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:39,107 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,107 INFO L82 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 16 times [2021-05-02 23:16:39,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675625950] [2021-05-02 23:16:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,110 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,111 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:39,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675625950] [2021-05-02 23:16:39,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675625950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:39,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442348676] [2021-05-02 23:16:39,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:39,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:39,282 INFO L87 Difference]: Start difference. First operand 1237 states and 1413 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,759 INFO L93 Difference]: Finished difference Result 4044 states and 4656 transitions. [2021-05-02 23:16:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:16:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,765 INFO L225 Difference]: With dead ends: 4044 [2021-05-02 23:16:41,765 INFO L226 Difference]: Without dead ends: 3995 [2021-05-02 23:16:41,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-05-02 23:16:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 1237. [2021-05-02 23:16:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 1.1436688311688312) internal successors, (1409), 1232 states have internal predecessors, (1409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1413 transitions. [2021-05-02 23:16:42,342 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1413 transitions. Word has length 75 [2021-05-02 23:16:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 1413 transitions. [2021-05-02 23:16:42,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1413 transitions. [2021-05-02 23:16:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:16:42,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,344 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:42,344 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 17 times [2021-05-02 23:16:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988186171] [2021-05-02 23:16:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,348 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,348 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:42,486 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988186171] [2021-05-02 23:16:42,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988186171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121317657] [2021-05-02 23:16:42,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:42,487 INFO L87 Difference]: Start difference. First operand 1237 states and 1413 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,156 INFO L93 Difference]: Finished difference Result 2586 states and 2958 transitions. [2021-05-02 23:16:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 23:16:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,161 INFO L225 Difference]: With dead ends: 2586 [2021-05-02 23:16:44,161 INFO L226 Difference]: Without dead ends: 2477 [2021-05-02 23:16:44,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-05-02 23:16:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1237. [2021-05-02 23:16:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 1.1436688311688312) internal successors, (1409), 1232 states have internal predecessors, (1409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1413 transitions. [2021-05-02 23:16:44,730 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1413 transitions. Word has length 76 [2021-05-02 23:16:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,730 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 1413 transitions. [2021-05-02 23:16:44,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1413 transitions. [2021-05-02 23:16:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:16:44,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,732 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:44,732 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 18 times [2021-05-02 23:16:44,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835701356] [2021-05-02 23:16:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,735 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:44,921 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:44,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835701356] [2021-05-02 23:16:44,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [835701356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:44,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:44,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:44,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179470579] [2021-05-02 23:16:44,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:44,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:44,922 INFO L87 Difference]: Start difference. First operand 1237 states and 1413 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,811 INFO L93 Difference]: Finished difference Result 4518 states and 5200 transitions. [2021-05-02 23:16:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 23:16:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,817 INFO L225 Difference]: With dead ends: 4518 [2021-05-02 23:16:47,817 INFO L226 Difference]: Without dead ends: 4469 [2021-05-02 23:16:47,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-05-02 23:16:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1237. [2021-05-02 23:16:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 1.1436688311688312) internal successors, (1409), 1232 states have internal predecessors, (1409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1413 transitions. [2021-05-02 23:16:48,405 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1413 transitions. Word has length 77 [2021-05-02 23:16:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,405 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 1413 transitions. [2021-05-02 23:16:48,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1413 transitions. [2021-05-02 23:16:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:48,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,408 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:48,408 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,408 INFO L82 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 19 times [2021-05-02 23:16:48,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607572195] [2021-05-02 23:16:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,412 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:48,573 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607572195] [2021-05-02 23:16:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607572195] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301187848] [2021-05-02 23:16:48,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:48,574 INFO L87 Difference]: Start difference. First operand 1237 states and 1413 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,604 INFO L93 Difference]: Finished difference Result 3116 states and 3566 transitions. [2021-05-02 23:16:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:50,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:16:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,608 INFO L225 Difference]: With dead ends: 3116 [2021-05-02 23:16:50,608 INFO L226 Difference]: Without dead ends: 3007 [2021-05-02 23:16:50,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-05-02 23:16:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1237. [2021-05-02 23:16:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 1.1436688311688312) internal successors, (1409), 1232 states have internal predecessors, (1409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1413 transitions. [2021-05-02 23:16:51,197 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1413 transitions. Word has length 78 [2021-05-02 23:16:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,197 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 1413 transitions. [2021-05-02 23:16:51,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1413 transitions. [2021-05-02 23:16:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:51,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,199 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:51,199 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash -588794316, now seen corresponding path program 5 times [2021-05-02 23:16:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906493204] [2021-05-02 23:16:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,202 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,203 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906493204] [2021-05-02 23:16:51,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906493204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632227909] [2021-05-02 23:16:51,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:51,456 INFO L87 Difference]: Start difference. First operand 1237 states and 1413 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,374 INFO L93 Difference]: Finished difference Result 7055 states and 8170 transitions. [2021-05-02 23:16:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:56,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:16:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,383 INFO L225 Difference]: With dead ends: 7055 [2021-05-02 23:16:56,383 INFO L226 Difference]: Without dead ends: 7011 [2021-05-02 23:16:56,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2021-05-02 23:16:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 1241. [2021-05-02 23:16:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1236 states have (on average 1.1448220064724919) internal successors, (1415), 1236 states have internal predecessors, (1415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1419 transitions. [2021-05-02 23:16:57,028 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1419 transitions. Word has length 78 [2021-05-02 23:16:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:57,029 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 1419 transitions. [2021-05-02 23:16:57,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1419 transitions. [2021-05-02 23:16:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:16:57,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:57,030 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:57,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:57,031 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 20 times [2021-05-02 23:16:57,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:57,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334831926] [2021-05-02 23:16:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:57,037 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:57,037 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:57,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334831926] [2021-05-02 23:16:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [334831926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:57,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:57,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557846429] [2021-05-02 23:16:57,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:57,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:57,243 INFO L87 Difference]: Start difference. First operand 1241 states and 1419 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,999 INFO L93 Difference]: Finished difference Result 4996 states and 5750 transitions. [2021-05-02 23:17:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:17:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 23:17:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:01,004 INFO L225 Difference]: With dead ends: 4996 [2021-05-02 23:17:01,004 INFO L226 Difference]: Without dead ends: 4947 [2021-05-02 23:17:01,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:17:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-05-02 23:17:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 1241. [2021-05-02 23:17:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1236 states have (on average 1.1448220064724919) internal successors, (1415), 1236 states have internal predecessors, (1415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1419 transitions. [2021-05-02 23:17:01,668 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1419 transitions. Word has length 79 [2021-05-02 23:17:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:01,668 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 1419 transitions. [2021-05-02 23:17:01,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1419 transitions. [2021-05-02 23:17:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:17:01,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:01,669 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:01,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:17:01,669 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 21 times [2021-05-02 23:17:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936293675] [2021-05-02 23:17:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:01,675 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:01,676 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:01,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:01,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936293675] [2021-05-02 23:17:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936293675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:01,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:01,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:17:01,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105161201] [2021-05-02 23:17:01,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:17:01,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:17:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:17:01,833 INFO L87 Difference]: Start difference. First operand 1241 states and 1419 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:04,547 INFO L93 Difference]: Finished difference Result 3594 states and 4116 transitions. [2021-05-02 23:17:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:17:04,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 23:17:04,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:04,550 INFO L225 Difference]: With dead ends: 3594 [2021-05-02 23:17:04,550 INFO L226 Difference]: Without dead ends: 3485 [2021-05-02 23:17:04,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:17:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-05-02 23:17:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1241. [2021-05-02 23:17:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1236 states have (on average 1.1448220064724919) internal successors, (1415), 1236 states have internal predecessors, (1415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1419 transitions. [2021-05-02 23:17:05,222 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1419 transitions. Word has length 80 [2021-05-02 23:17:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:05,222 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 1419 transitions. [2021-05-02 23:17:05,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1419 transitions. [2021-05-02 23:17:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:17:05,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,224 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:17:05,224 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,224 INFO L82 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 22 times [2021-05-02 23:17:05,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702883266] [2021-05-02 23:17:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,228 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:05,228 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:05,329 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:05,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702883266] [2021-05-02 23:17:05,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702883266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:05,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:05,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:17:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100282819] [2021-05-02 23:17:05,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:17:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:05,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:17:05,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:17:05,330 INFO L87 Difference]: Start difference. First operand 1241 states and 1419 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,040 INFO L93 Difference]: Finished difference Result 1469 states and 1667 transitions. [2021-05-02 23:17:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:17:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:17:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,041 INFO L225 Difference]: With dead ends: 1469 [2021-05-02 23:17:06,041 INFO L226 Difference]: Without dead ends: 815 [2021-05-02 23:17:06,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:17:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-05-02 23:17:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 730. [2021-05-02 23:17:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1517241379310346) internal successors, (835), 725 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 839 transitions. [2021-05-02 23:17:06,500 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 839 transitions. Word has length 81 [2021-05-02 23:17:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,500 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 839 transitions. [2021-05-02 23:17:06,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 839 transitions. [2021-05-02 23:17:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:17:06,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,501 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:17:06,501 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 23 times [2021-05-02 23:17:06,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990737666] [2021-05-02 23:17:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,505 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:06,506 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,738 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990737666] [2021-05-02 23:17:06,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990737666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:17:06,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322455382] [2021-05-02 23:17:06,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:17:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:17:06,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:17:06,739 INFO L87 Difference]: Start difference. First operand 730 states and 839 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,053 INFO L93 Difference]: Finished difference Result 4887 states and 5636 transitions. [2021-05-02 23:17:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:17:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:17:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,058 INFO L225 Difference]: With dead ends: 4887 [2021-05-02 23:17:11,058 INFO L226 Difference]: Without dead ends: 4838 [2021-05-02 23:17:11,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:17:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2021-05-02 23:17:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 730. [2021-05-02 23:17:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1517241379310346) internal successors, (835), 725 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 839 transitions. [2021-05-02 23:17:11,585 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 839 transitions. Word has length 81 [2021-05-02 23:17:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,585 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 839 transitions. [2021-05-02 23:17:11,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 839 transitions. [2021-05-02 23:17:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:17:11,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,586 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:17:11,586 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 24 times [2021-05-02 23:17:11,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122928099] [2021-05-02 23:17:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,597 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,598 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,358 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2021-05-02 23:17:12,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:12,859 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122928099] [2021-05-02 23:17:12,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [122928099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:12,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:12,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:17:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258326531] [2021-05-02 23:17:12,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:17:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:17:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:17:12,860 INFO L87 Difference]: Start difference. First operand 730 states and 839 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,958 INFO L93 Difference]: Finished difference Result 805 states and 918 transitions. [2021-05-02 23:17:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:17:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:17:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,959 INFO L225 Difference]: With dead ends: 805 [2021-05-02 23:17:13,959 INFO L226 Difference]: Without dead ends: 600 [2021-05-02 23:17:13,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1290.5ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:17:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-05-02 23:17:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-05-02 23:17:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 595 states have (on average 1.169747899159664) internal successors, (696), 595 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 700 transitions. [2021-05-02 23:17:14,394 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 700 transitions. Word has length 82 [2021-05-02 23:17:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:14,394 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 700 transitions. [2021-05-02 23:17:14,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 700 transitions. [2021-05-02 23:17:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:17:14,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:14,395 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:14,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:17:14,395 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 25 times [2021-05-02 23:17:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:14,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53960060] [2021-05-02 23:17:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:14,409 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:14,410 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:14,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:14,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53960060] [2021-05-02 23:17:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [53960060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:17:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652488722] [2021-05-02 23:17:14,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:17:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:17:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:17:14,727 INFO L87 Difference]: Start difference. First operand 600 states and 700 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:17,844 INFO L93 Difference]: Finished difference Result 3246 states and 3741 transitions. [2021-05-02 23:17:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:17:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:17:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:17,849 INFO L225 Difference]: With dead ends: 3246 [2021-05-02 23:17:17,849 INFO L226 Difference]: Without dead ends: 3137 [2021-05-02 23:17:17,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:17:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-05-02 23:17:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 600. [2021-05-02 23:17:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 595 states have (on average 1.169747899159664) internal successors, (696), 595 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 700 transitions. [2021-05-02 23:17:18,305 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 700 transitions. Word has length 82 [2021-05-02 23:17:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:18,305 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 700 transitions. [2021-05-02 23:17:18,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 700 transitions. [2021-05-02 23:17:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:17:18,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:18,306 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:18,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:17:18,306 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash -813744598, now seen corresponding path program 6 times [2021-05-02 23:17:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755968021] [2021-05-02 23:17:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:18,311 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:18,312 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:18,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:18,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755968021] [2021-05-02 23:17:18,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [755968021] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:18,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:18,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:17:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426917318] [2021-05-02 23:17:18,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:17:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:17:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:17:18,643 INFO L87 Difference]: Start difference. First operand 600 states and 700 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:25,196 INFO L93 Difference]: Finished difference Result 6784 states and 7877 transitions. [2021-05-02 23:17:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:17:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:17:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:25,202 INFO L225 Difference]: With dead ends: 6784 [2021-05-02 23:17:25,202 INFO L226 Difference]: Without dead ends: 6740 [2021-05-02 23:17:25,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:17:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6740 states. [2021-05-02 23:17:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6740 to 602. [2021-05-02 23:17:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 597 states have (on average 1.170854271356784) internal successors, (699), 597 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 703 transitions. [2021-05-02 23:17:25,688 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 703 transitions. Word has length 82 [2021-05-02 23:17:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:25,688 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 703 transitions. [2021-05-02 23:17:25,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 703 transitions. [2021-05-02 23:17:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:17:25,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:25,689 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:25,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:17:25,689 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 26 times [2021-05-02 23:17:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:25,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157454913] [2021-05-02 23:17:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:25,693 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:25,694 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:27,083 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:27,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157454913] [2021-05-02 23:17:27,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157454913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:27,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:27,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:17:27,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904613007] [2021-05-02 23:17:27,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:17:27,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:17:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:17:27,084 INFO L87 Difference]: Start difference. First operand 602 states and 703 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:29,630 INFO L93 Difference]: Finished difference Result 1424 states and 1655 transitions. [2021-05-02 23:17:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:17:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:17:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:29,631 INFO L225 Difference]: With dead ends: 1424 [2021-05-02 23:17:29,631 INFO L226 Difference]: Without dead ends: 1419 [2021-05-02 23:17:29,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1852.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1800, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:17:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-05-02 23:17:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 754. [2021-05-02 23:17:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 1.1682242990654206) internal successors, (875), 749 states have internal predecessors, (875), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 879 transitions. [2021-05-02 23:17:30,249 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 879 transitions. Word has length 83 [2021-05-02 23:17:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:30,250 INFO L480 AbstractCegarLoop]: Abstraction has 754 states and 879 transitions. [2021-05-02 23:17:30,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 879 transitions. [2021-05-02 23:17:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:17:30,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:30,251 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:30,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:17:30,251 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 27 times [2021-05-02 23:17:30,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:30,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844102446] [2021-05-02 23:17:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:30,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:30,259 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,855 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 49 [2021-05-02 23:17:31,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:31,409 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844102446] [2021-05-02 23:17:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [844102446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:31,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:31,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:17:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86825725] [2021-05-02 23:17:31,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:17:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:17:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:17:31,410 INFO L87 Difference]: Start difference. First operand 754 states and 879 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:34,967 INFO L93 Difference]: Finished difference Result 2121 states and 2460 transitions. [2021-05-02 23:17:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:17:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:17:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:34,969 INFO L225 Difference]: With dead ends: 2121 [2021-05-02 23:17:34,969 INFO L226 Difference]: Without dead ends: 1812 [2021-05-02 23:17:34,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2002.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:17:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-05-02 23:17:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 971. [2021-05-02 23:17:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1625258799171843) internal successors, (1123), 966 states have internal predecessors, (1123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1127 transitions. [2021-05-02 23:17:35,846 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1127 transitions. Word has length 83 [2021-05-02 23:17:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:35,846 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 1127 transitions. [2021-05-02 23:17:35,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1127 transitions. [2021-05-02 23:17:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:17:35,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:35,847 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:35,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:17:35,847 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1737453601, now seen corresponding path program 28 times [2021-05-02 23:17:35,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:35,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110291574] [2021-05-02 23:17:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:35,861 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:35,862 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:36,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:36,163 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110291574] [2021-05-02 23:17:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110291574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:36,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:36,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:17:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725561142] [2021-05-02 23:17:36,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:17:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:17:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:17:36,164 INFO L87 Difference]: Start difference. First operand 971 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:37,669 INFO L93 Difference]: Finished difference Result 1320 states and 1521 transitions. [2021-05-02 23:17:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:17:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:17:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:37,671 INFO L225 Difference]: With dead ends: 1320 [2021-05-02 23:17:37,671 INFO L226 Difference]: Without dead ends: 1315 [2021-05-02 23:17:37,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:17:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-05-02 23:17:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 864. [2021-05-02 23:17:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 1.1711292200232828) internal successors, (1006), 859 states have internal predecessors, (1006), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1010 transitions. [2021-05-02 23:17:38,479 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1010 transitions. Word has length 83 [2021-05-02 23:17:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,479 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1010 transitions. [2021-05-02 23:17:38,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1010 transitions. [2021-05-02 23:17:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:17:38,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,480 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:17:38,480 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 29 times [2021-05-02 23:17:38,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535830627] [2021-05-02 23:17:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,484 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,485 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:38,641 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:38,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535830627] [2021-05-02 23:17:38,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [535830627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:38,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:38,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:17:38,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444238309] [2021-05-02 23:17:38,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:17:38,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:17:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:17:38,642 INFO L87 Difference]: Start difference. First operand 864 states and 1010 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:40,465 INFO L93 Difference]: Finished difference Result 1341 states and 1551 transitions. [2021-05-02 23:17:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:17:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:17:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:40,467 INFO L225 Difference]: With dead ends: 1341 [2021-05-02 23:17:40,467 INFO L226 Difference]: Without dead ends: 1336 [2021-05-02 23:17:40,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:17:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-05-02 23:17:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1063. [2021-05-02 23:17:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1058 states have (on average 1.166351606805293) internal successors, (1234), 1058 states have internal predecessors, (1234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1238 transitions. [2021-05-02 23:17:41,543 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1238 transitions. Word has length 93 [2021-05-02 23:17:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,543 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1238 transitions. [2021-05-02 23:17:41,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1238 transitions. [2021-05-02 23:17:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:17:41,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,544 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:17:41,545 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 30 times [2021-05-02 23:17:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76051042] [2021-05-02 23:17:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,552 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:41,552 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,108 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 42 [2021-05-02 23:17:42,279 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 38 [2021-05-02 23:17:42,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:42,916 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76051042] [2021-05-02 23:17:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [76051042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:42,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:42,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:17:42,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898550309] [2021-05-02 23:17:42,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:17:42,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:17:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:17:42,917 INFO L87 Difference]: Start difference. First operand 1063 states and 1238 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:46,600 INFO L93 Difference]: Finished difference Result 2750 states and 3169 transitions. [2021-05-02 23:17:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:17:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:17:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:46,602 INFO L225 Difference]: With dead ends: 2750 [2021-05-02 23:17:46,602 INFO L226 Difference]: Without dead ends: 2277 [2021-05-02 23:17:46,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1508.7ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:17:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-05-02 23:17:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1432. [2021-05-02 23:17:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1427 states have (on average 1.1408549404344779) internal successors, (1628), 1427 states have internal predecessors, (1628), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1632 transitions. [2021-05-02 23:17:48,178 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1632 transitions. Word has length 93 [2021-05-02 23:17:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:48,178 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 1632 transitions. [2021-05-02 23:17:48,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1632 transitions. [2021-05-02 23:17:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:17:48,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:48,180 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:48,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:17:48,180 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1642709553, now seen corresponding path program 31 times [2021-05-02 23:17:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478029747] [2021-05-02 23:17:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:48,186 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:48,186 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:49,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478029747] [2021-05-02 23:17:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478029747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:49,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:49,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:17:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503313817] [2021-05-02 23:17:49,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:17:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:17:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:17:49,139 INFO L87 Difference]: Start difference. First operand 1432 states and 1632 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:52,785 INFO L93 Difference]: Finished difference Result 2673 states and 3048 transitions. [2021-05-02 23:17:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:17:52,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:17:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:52,788 INFO L225 Difference]: With dead ends: 2673 [2021-05-02 23:17:52,788 INFO L226 Difference]: Without dead ends: 2537 [2021-05-02 23:17:52,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1134.8ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:17:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-05-02 23:17:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1797. [2021-05-02 23:17:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1792 states have (on average 1.13671875) internal successors, (2037), 1792 states have internal predecessors, (2037), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2041 transitions. [2021-05-02 23:17:54,736 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2041 transitions. Word has length 93 [2021-05-02 23:17:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:54,736 INFO L480 AbstractCegarLoop]: Abstraction has 1797 states and 2041 transitions. [2021-05-02 23:17:54,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2041 transitions. [2021-05-02 23:17:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:17:54,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:54,738 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:54,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:17:54,738 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 32 times [2021-05-02 23:17:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219087907] [2021-05-02 23:17:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:54,743 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:54,744 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,265 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2021-05-02 23:17:56,262 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 63 [2021-05-02 23:17:56,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:56,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:56,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219087907] [2021-05-02 23:17:56,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219087907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:56,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:56,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:17:56,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736517992] [2021-05-02 23:17:56,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:17:56,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:17:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:17:56,394 INFO L87 Difference]: Start difference. First operand 1797 states and 2041 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:01,534 INFO L93 Difference]: Finished difference Result 3023 states and 3423 transitions. [2021-05-02 23:18:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:18:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:01,536 INFO L225 Difference]: With dead ends: 3023 [2021-05-02 23:18:01,536 INFO L226 Difference]: Without dead ends: 2944 [2021-05-02 23:18:01,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2132.8ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:18:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-05-02 23:18:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2084. [2021-05-02 23:18:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2079 states have (on average 1.1216931216931216) internal successors, (2332), 2079 states have internal predecessors, (2332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2336 transitions. [2021-05-02 23:18:04,081 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2336 transitions. Word has length 93 [2021-05-02 23:18:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:04,081 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 2336 transitions. [2021-05-02 23:18:04,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2336 transitions. [2021-05-02 23:18:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:18:04,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:04,083 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:04,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:18:04,083 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 33 times [2021-05-02 23:18:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:04,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999010718] [2021-05-02 23:18:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:04,087 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:04,088 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:04,624 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 42 [2021-05-02 23:18:04,792 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 39 [2021-05-02 23:18:05,309 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 43 [2021-05-02 23:18:05,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:05,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:05,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999010718] [2021-05-02 23:18:05,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999010718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:05,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:05,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:18:05,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915042982] [2021-05-02 23:18:05,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:18:05,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:18:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:18:05,542 INFO L87 Difference]: Start difference. First operand 2084 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:10,579 INFO L93 Difference]: Finished difference Result 3491 states and 3964 transitions. [2021-05-02 23:18:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:18:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:10,581 INFO L225 Difference]: With dead ends: 3491 [2021-05-02 23:18:10,581 INFO L226 Difference]: Without dead ends: 2845 [2021-05-02 23:18:10,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1690.5ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:18:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-05-02 23:18:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2591. [2021-05-02 23:18:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2586 states have (on average 1.1156225831399846) internal successors, (2885), 2586 states have internal predecessors, (2885), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 2889 transitions. [2021-05-02 23:18:13,815 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 2889 transitions. Word has length 93 [2021-05-02 23:18:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:13,815 INFO L480 AbstractCegarLoop]: Abstraction has 2591 states and 2889 transitions. [2021-05-02 23:18:13,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 2889 transitions. [2021-05-02 23:18:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:18:13,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:13,818 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:13,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:18:13,818 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 34 times [2021-05-02 23:18:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:13,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52459654] [2021-05-02 23:18:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:13,823 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:13,824 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2021-05-02 23:18:15,369 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 60 [2021-05-02 23:18:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:15,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:15,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52459654] [2021-05-02 23:18:15,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [52459654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:15,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:15,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:18:15,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556400435] [2021-05-02 23:18:15,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:18:15,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:15,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:18:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:18:15,511 INFO L87 Difference]: Start difference. First operand 2591 states and 2889 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:19,803 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-05-02 23:18:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:20,690 INFO L93 Difference]: Finished difference Result 2926 states and 3278 transitions. [2021-05-02 23:18:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:18:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:20,693 INFO L225 Difference]: With dead ends: 2926 [2021-05-02 23:18:20,693 INFO L226 Difference]: Without dead ends: 2872 [2021-05-02 23:18:20,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2187.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:18:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-05-02 23:18:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2594. [2021-05-02 23:18:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.115488605639243) internal successors, (2888), 2589 states have internal predecessors, (2888), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 2892 transitions. [2021-05-02 23:18:23,820 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 2892 transitions. Word has length 93 [2021-05-02 23:18:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:23,821 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 2892 transitions. [2021-05-02 23:18:23,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 2892 transitions. [2021-05-02 23:18:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:18:23,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:23,823 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:23,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:18:23,823 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 35 times [2021-05-02 23:18:23,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:23,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209697652] [2021-05-02 23:18:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:23,827 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:23,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:24,758 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:24,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209697652] [2021-05-02 23:18:24,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209697652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:24,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:24,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:18:24,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247125920] [2021-05-02 23:18:24,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:18:24,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:18:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:18:24,759 INFO L87 Difference]: Start difference. First operand 2594 states and 2892 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:29,354 INFO L93 Difference]: Finished difference Result 2979 states and 3312 transitions. [2021-05-02 23:18:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:18:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:29,358 INFO L225 Difference]: With dead ends: 2979 [2021-05-02 23:18:29,358 INFO L226 Difference]: Without dead ends: 2813 [2021-05-02 23:18:29,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1093.2ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:18:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-05-02 23:18:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2594. [2021-05-02 23:18:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2589 states have (on average 1.1104673619157976) internal successors, (2875), 2589 states have internal predecessors, (2875), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 2879 transitions. [2021-05-02 23:18:32,712 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 2879 transitions. Word has length 93 [2021-05-02 23:18:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:32,712 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 2879 transitions. [2021-05-02 23:18:32,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 2879 transitions. [2021-05-02 23:18:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:18:32,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:32,714 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:32,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:18:32,714 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 36 times [2021-05-02 23:18:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:32,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591973788] [2021-05-02 23:18:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:32,719 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:32,719 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:33,367 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-05-02 23:18:34,131 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2021-05-02 23:18:34,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:34,263 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591973788] [2021-05-02 23:18:34,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591973788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:34,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:34,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:18:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443616175] [2021-05-02 23:18:34,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:18:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:18:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:18:34,264 INFO L87 Difference]: Start difference. First operand 2594 states and 2879 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,331 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-05-02 23:18:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:40,749 INFO L93 Difference]: Finished difference Result 3344 states and 3726 transitions. [2021-05-02 23:18:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:18:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:40,753 INFO L225 Difference]: With dead ends: 3344 [2021-05-02 23:18:40,753 INFO L226 Difference]: Without dead ends: 3208 [2021-05-02 23:18:40,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2389.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:18:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-05-02 23:18:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2560. [2021-05-02 23:18:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2555 states have (on average 1.106849315068493) internal successors, (2828), 2555 states have internal predecessors, (2828), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 2832 transitions. [2021-05-02 23:18:44,198 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 2832 transitions. Word has length 93 [2021-05-02 23:18:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:44,198 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 2832 transitions. [2021-05-02 23:18:44,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 2832 transitions. [2021-05-02 23:18:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:18:44,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:44,201 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:44,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:18:44,201 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 37 times [2021-05-02 23:18:44,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:44,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214266564] [2021-05-02 23:18:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:44,206 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:44,207 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:44,511 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:44,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214266564] [2021-05-02 23:18:44,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [214266564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:44,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:44,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:18:44,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60767013] [2021-05-02 23:18:44,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:18:44,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:18:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:18:44,512 INFO L87 Difference]: Start difference. First operand 2560 states and 2832 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:57,089 INFO L93 Difference]: Finished difference Result 8596 states and 9790 transitions. [2021-05-02 23:18:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:18:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:18:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:57,096 INFO L225 Difference]: With dead ends: 8596 [2021-05-02 23:18:57,096 INFO L226 Difference]: Without dead ends: 8529 [2021-05-02 23:18:57,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:18:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2021-05-02 23:19:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 2560. [2021-05-02 23:19:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2555 states have (on average 1.106849315068493) internal successors, (2828), 2555 states have internal predecessors, (2828), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 2832 transitions. [2021-05-02 23:19:00,456 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 2832 transitions. Word has length 93 [2021-05-02 23:19:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:00,456 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 2832 transitions. [2021-05-02 23:19:00,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 2832 transitions. [2021-05-02 23:19:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:19:00,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:00,484 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:00,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:19:00,484 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 38 times [2021-05-02 23:19:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:00,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420416830] [2021-05-02 23:19:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:00,488 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:00,488 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:00,695 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:00,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420416830] [2021-05-02 23:19:00,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [420416830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:00,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:00,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:19:00,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087239498] [2021-05-02 23:19:00,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:19:00,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:19:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:19:00,696 INFO L87 Difference]: Start difference. First operand 2560 states and 2832 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:10,263 INFO L93 Difference]: Finished difference Result 6318 states and 7149 transitions. [2021-05-02 23:19:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:19:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 23:19:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:10,270 INFO L225 Difference]: With dead ends: 6318 [2021-05-02 23:19:10,270 INFO L226 Difference]: Without dead ends: 6171 [2021-05-02 23:19:10,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:19:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2021-05-02 23:19:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 2560. [2021-05-02 23:19:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2555 states have (on average 1.106849315068493) internal successors, (2828), 2555 states have internal predecessors, (2828), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 2832 transitions. [2021-05-02 23:19:13,975 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 2832 transitions. Word has length 94 [2021-05-02 23:19:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:13,975 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 2832 transitions. [2021-05-02 23:19:13,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 2832 transitions. [2021-05-02 23:19:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:19:13,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:13,978 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:13,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:19:13,978 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash 955226037, now seen corresponding path program 7 times [2021-05-02 23:19:13,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:13,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352878559] [2021-05-02 23:19:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:13,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:13,984 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:14,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:14,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352878559] [2021-05-02 23:19:14,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [352878559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:14,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:14,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:19:14,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56175487] [2021-05-02 23:19:14,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:19:14,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:19:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:19:14,355 INFO L87 Difference]: Start difference. First operand 2560 states and 2832 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:32,496 INFO L93 Difference]: Finished difference Result 11799 states and 13516 transitions. [2021-05-02 23:19:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:19:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 23:19:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:32,507 INFO L225 Difference]: With dead ends: 11799 [2021-05-02 23:19:32,507 INFO L226 Difference]: Without dead ends: 11732 [2021-05-02 23:19:32,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:19:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11732 states. [2021-05-02 23:19:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11732 to 2562. [2021-05-02 23:19:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2557 states have (on average 1.1071568244035979) internal successors, (2831), 2557 states have internal predecessors, (2831), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 2835 transitions. [2021-05-02 23:19:35,888 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 2835 transitions. Word has length 94 [2021-05-02 23:19:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:35,888 INFO L480 AbstractCegarLoop]: Abstraction has 2562 states and 2835 transitions. [2021-05-02 23:19:35,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 2835 transitions. [2021-05-02 23:19:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:19:35,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:35,890 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:35,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:19:35,890 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1595514260, now seen corresponding path program 39 times [2021-05-02 23:19:35,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:35,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592967805] [2021-05-02 23:19:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:35,895 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:35,896 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:36,054 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:36,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592967805] [2021-05-02 23:19:36,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592967805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:36,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:36,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:19:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941090779] [2021-05-02 23:19:36,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:19:36,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:19:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:19:36,055 INFO L87 Difference]: Start difference. First operand 2562 states and 2835 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:42,038 INFO L93 Difference]: Finished difference Result 4006 states and 4497 transitions. [2021-05-02 23:19:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:19:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:19:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:42,043 INFO L225 Difference]: With dead ends: 4006 [2021-05-02 23:19:42,044 INFO L226 Difference]: Without dead ends: 3776 [2021-05-02 23:19:42,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:19:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-05-02 23:19:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2731. [2021-05-02 23:19:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2726 states have (on average 1.1100513573000734) internal successors, (3026), 2726 states have internal predecessors, (3026), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3030 transitions. [2021-05-02 23:19:46,301 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3030 transitions. Word has length 95 [2021-05-02 23:19:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:46,301 INFO L480 AbstractCegarLoop]: Abstraction has 2731 states and 3030 transitions. [2021-05-02 23:19:46,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3030 transitions. [2021-05-02 23:19:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:19:46,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:46,304 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:46,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:19:46,304 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 40 times [2021-05-02 23:19:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:46,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944179539] [2021-05-02 23:19:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:46,317 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:46,318 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:46,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944179539] [2021-05-02 23:19:46,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944179539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:46,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:46,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:19:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511179860] [2021-05-02 23:19:46,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:19:46,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:19:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:19:46,658 INFO L87 Difference]: Start difference. First operand 2731 states and 3030 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:04,267 INFO L93 Difference]: Finished difference Result 9415 states and 10729 transitions. [2021-05-02 23:20:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:20:04,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:20:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:04,279 INFO L225 Difference]: With dead ends: 9415 [2021-05-02 23:20:04,279 INFO L226 Difference]: Without dead ends: 9348 [2021-05-02 23:20:04,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:20:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9348 states. [2021-05-02 23:20:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9348 to 2731. [2021-05-02 23:20:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2726 states have (on average 1.1100513573000734) internal successors, (3026), 2726 states have internal predecessors, (3026), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3030 transitions. [2021-05-02 23:20:08,775 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3030 transitions. Word has length 95 [2021-05-02 23:20:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:08,775 INFO L480 AbstractCegarLoop]: Abstraction has 2731 states and 3030 transitions. [2021-05-02 23:20:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3030 transitions. [2021-05-02 23:20:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:20:08,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:08,779 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:08,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:20:08,779 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 41 times [2021-05-02 23:20:08,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:08,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7151565] [2021-05-02 23:20:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:08,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:08,786 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:09,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:09,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7151565] [2021-05-02 23:20:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [7151565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:09,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:09,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:20:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241770624] [2021-05-02 23:20:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:20:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:20:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:20:09,083 INFO L87 Difference]: Start difference. First operand 2731 states and 3030 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:23,000 INFO L93 Difference]: Finished difference Result 7137 states and 8088 transitions. [2021-05-02 23:20:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:20:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:20:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:23,011 INFO L225 Difference]: With dead ends: 7137 [2021-05-02 23:20:23,011 INFO L226 Difference]: Without dead ends: 6990 [2021-05-02 23:20:23,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:20:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-05-02 23:20:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 2731. [2021-05-02 23:20:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2726 states have (on average 1.1100513573000734) internal successors, (3026), 2726 states have internal predecessors, (3026), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3030 transitions. [2021-05-02 23:20:27,549 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3030 transitions. Word has length 96 [2021-05-02 23:20:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:27,549 INFO L480 AbstractCegarLoop]: Abstraction has 2731 states and 3030 transitions. [2021-05-02 23:20:27,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3030 transitions. [2021-05-02 23:20:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:20:27,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:27,552 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:27,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:20:27,553 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -861947120, now seen corresponding path program 8 times [2021-05-02 23:20:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:27,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860751183] [2021-05-02 23:20:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:27,562 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:27,564 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:27,976 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860751183] [2021-05-02 23:20:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [860751183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:27,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:27,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:20:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862737016] [2021-05-02 23:20:27,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:20:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:20:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:20:27,977 INFO L87 Difference]: Start difference. First operand 2731 states and 3030 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:54,219 INFO L93 Difference]: Finished difference Result 12618 states and 14455 transitions. [2021-05-02 23:20:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:20:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:20:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:54,240 INFO L225 Difference]: With dead ends: 12618 [2021-05-02 23:20:54,240 INFO L226 Difference]: Without dead ends: 12551 [2021-05-02 23:20:54,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:20:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-05-02 23:20:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 2733. [2021-05-02 23:20:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2728 states have (on average 1.1103372434017595) internal successors, (3029), 2728 states have internal predecessors, (3029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3033 transitions. [2021-05-02 23:20:59,107 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3033 transitions. Word has length 96 [2021-05-02 23:20:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:59,107 INFO L480 AbstractCegarLoop]: Abstraction has 2733 states and 3033 transitions. [2021-05-02 23:20:59,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3033 transitions. [2021-05-02 23:20:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:20:59,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:59,111 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:59,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:20:59,111 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1097721241, now seen corresponding path program 42 times [2021-05-02 23:20:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:59,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817360751] [2021-05-02 23:20:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:59,119 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:59,121 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:59,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:59,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:59,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817360751] [2021-05-02 23:20:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817360751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:20:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628293208] [2021-05-02 23:20:59,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:20:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:20:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:20:59,371 INFO L87 Difference]: Start difference. First operand 2733 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:09,117 INFO L93 Difference]: Finished difference Result 4831 states and 5442 transitions. [2021-05-02 23:21:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:21:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:21:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:09,124 INFO L225 Difference]: With dead ends: 4831 [2021-05-02 23:21:09,125 INFO L226 Difference]: Without dead ends: 4601 [2021-05-02 23:21:09,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:21:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-05-02 23:21:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2733. [2021-05-02 23:21:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2728 states have (on average 1.1103372434017595) internal successors, (3029), 2728 states have internal predecessors, (3029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3033 transitions. [2021-05-02 23:21:14,068 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3033 transitions. Word has length 97 [2021-05-02 23:21:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:14,069 INFO L480 AbstractCegarLoop]: Abstraction has 2733 states and 3033 transitions. [2021-05-02 23:21:14,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3033 transitions. [2021-05-02 23:21:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:21:14,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:14,072 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:14,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:21:14,072 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 43 times [2021-05-02 23:21:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:14,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174787605] [2021-05-02 23:21:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:14,079 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:14,080 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:14,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:14,463 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:14,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174787605] [2021-05-02 23:21:14,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174787605] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:14,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:14,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:21:14,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365102762] [2021-05-02 23:21:14,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:21:14,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:21:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:21:14,464 INFO L87 Difference]: Start difference. First operand 2733 states and 3033 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:38,195 INFO L93 Difference]: Finished difference Result 10234 states and 11668 transitions. [2021-05-02 23:21:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:21:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:21:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:38,213 INFO L225 Difference]: With dead ends: 10234 [2021-05-02 23:21:38,213 INFO L226 Difference]: Without dead ends: 10167 [2021-05-02 23:21:38,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:21:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10167 states. [2021-05-02 23:21:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10167 to 2733. [2021-05-02 23:21:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2728 states have (on average 1.1103372434017595) internal successors, (3029), 2728 states have internal predecessors, (3029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3033 transitions. [2021-05-02 23:21:43,490 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3033 transitions. Word has length 97 [2021-05-02 23:21:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:43,490 INFO L480 AbstractCegarLoop]: Abstraction has 2733 states and 3033 transitions. [2021-05-02 23:21:43,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3033 transitions. [2021-05-02 23:21:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:21:43,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:43,493 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:43,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:21:43,494 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 44 times [2021-05-02 23:21:43,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:43,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675982942] [2021-05-02 23:21:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:43,500 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:43,501 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:43,791 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:43,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675982942] [2021-05-02 23:21:43,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675982942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:43,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:43,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:21:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369265751] [2021-05-02 23:21:43,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:21:43,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:21:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:21:43,792 INFO L87 Difference]: Start difference. First operand 2733 states and 3033 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:58,629 INFO L93 Difference]: Finished difference Result 7962 states and 9033 transitions. [2021-05-02 23:21:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:21:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 23:21:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:58,639 INFO L225 Difference]: With dead ends: 7962 [2021-05-02 23:21:58,639 INFO L226 Difference]: Without dead ends: 7815 [2021-05-02 23:21:58,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:21:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7815 states. [2021-05-02 23:22:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7815 to 2733. [2021-05-02 23:22:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2728 states have (on average 1.1103372434017595) internal successors, (3029), 2728 states have internal predecessors, (3029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3033 transitions. [2021-05-02 23:22:02,628 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3033 transitions. Word has length 98 [2021-05-02 23:22:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:02,628 INFO L480 AbstractCegarLoop]: Abstraction has 2733 states and 3033 transitions. [2021-05-02 23:22:02,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3033 transitions. [2021-05-02 23:22:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:22:02,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:02,630 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:02,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:22:02,630 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:02,631 INFO L82 PathProgramCache]: Analyzing trace with hash 886338475, now seen corresponding path program 9 times [2021-05-02 23:22:02,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:02,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360018484] [2021-05-02 23:22:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:02,635 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:02,636 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:03,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360018484] [2021-05-02 23:22:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360018484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:03,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:03,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:22:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963154660] [2021-05-02 23:22:03,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:22:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:22:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:22:03,003 INFO L87 Difference]: Start difference. First operand 2733 states and 3033 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:31,537 INFO L93 Difference]: Finished difference Result 13437 states and 15394 transitions. [2021-05-02 23:22:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:22:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 23:22:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:31,553 INFO L225 Difference]: With dead ends: 13437 [2021-05-02 23:22:31,553 INFO L226 Difference]: Without dead ends: 13370 [2021-05-02 23:22:31,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:22:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13370 states. [2021-05-02 23:22:35,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13370 to 2735. [2021-05-02 23:22:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2730 states have (on average 1.1106227106227107) internal successors, (3032), 2730 states have internal predecessors, (3032), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3036 transitions. [2021-05-02 23:22:35,629 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3036 transitions. Word has length 98 [2021-05-02 23:22:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:35,629 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 3036 transitions. [2021-05-02 23:22:35,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3036 transitions. [2021-05-02 23:22:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:22:35,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:35,631 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:35,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:22:35,631 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -540000162, now seen corresponding path program 45 times [2021-05-02 23:22:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:35,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371497821] [2021-05-02 23:22:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:35,637 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:35,637 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:35,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:35,838 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:35,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371497821] [2021-05-02 23:22:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371497821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:35,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:35,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:22:35,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335146418] [2021-05-02 23:22:35,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:22:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:22:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:22:35,839 INFO L87 Difference]: Start difference. First operand 2735 states and 3036 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:47,970 INFO L93 Difference]: Finished difference Result 5644 states and 6375 transitions. [2021-05-02 23:22:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:22:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:22:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:47,977 INFO L225 Difference]: With dead ends: 5644 [2021-05-02 23:22:47,977 INFO L226 Difference]: Without dead ends: 5414 [2021-05-02 23:22:47,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:22:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-05-02 23:22:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 2735. [2021-05-02 23:22:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2730 states have (on average 1.1106227106227107) internal successors, (3032), 2730 states have internal predecessors, (3032), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3036 transitions. [2021-05-02 23:22:53,319 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3036 transitions. Word has length 99 [2021-05-02 23:22:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:53,319 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 3036 transitions. [2021-05-02 23:22:53,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3036 transitions. [2021-05-02 23:22:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:22:53,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:53,322 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:53,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:22:53,323 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash -218311863, now seen corresponding path program 46 times [2021-05-02 23:22:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:53,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143642163] [2021-05-02 23:22:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:53,329 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:53,330 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:53,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:53,715 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:53,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143642163] [2021-05-02 23:22:53,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143642163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:53,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:53,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:22:53,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112131251] [2021-05-02 23:22:53,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:22:53,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:22:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:22:53,717 INFO L87 Difference]: Start difference. First operand 2735 states and 3036 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:23,713 INFO L93 Difference]: Finished difference Result 11053 states and 12607 transitions. [2021-05-02 23:23:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:23:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:23:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:23,732 INFO L225 Difference]: With dead ends: 11053 [2021-05-02 23:23:23,732 INFO L226 Difference]: Without dead ends: 10986 [2021-05-02 23:23:23,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:23:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10986 states. [2021-05-02 23:23:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10986 to 2735. [2021-05-02 23:23:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2730 states have (on average 1.1106227106227107) internal successors, (3032), 2730 states have internal predecessors, (3032), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3036 transitions. [2021-05-02 23:23:29,458 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3036 transitions. Word has length 99 [2021-05-02 23:23:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:29,458 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 3036 transitions. [2021-05-02 23:23:29,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3036 transitions. [2021-05-02 23:23:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:23:29,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:29,462 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:29,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:23:29,462 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 47 times [2021-05-02 23:23:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:29,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462566667] [2021-05-02 23:23:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:29,469 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:29,471 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:29,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:29,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462566667] [2021-05-02 23:23:29,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462566667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:29,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:29,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:23:29,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813999952] [2021-05-02 23:23:29,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:23:29,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:23:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:23:29,822 INFO L87 Difference]: Start difference. First operand 2735 states and 3036 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:53,041 INFO L93 Difference]: Finished difference Result 8775 states and 9966 transitions. [2021-05-02 23:23:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:23:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:23:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:53,057 INFO L225 Difference]: With dead ends: 8775 [2021-05-02 23:23:53,058 INFO L226 Difference]: Without dead ends: 8628 [2021-05-02 23:23:53,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:23:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8628 states. [2021-05-02 23:23:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8628 to 2735. [2021-05-02 23:23:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2730 states have (on average 1.1106227106227107) internal successors, (3032), 2730 states have internal predecessors, (3032), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3036 transitions. [2021-05-02 23:23:57,634 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3036 transitions. Word has length 100 [2021-05-02 23:23:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:57,634 INFO L480 AbstractCegarLoop]: Abstraction has 2735 states and 3036 transitions. [2021-05-02 23:23:57,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3036 transitions. [2021-05-02 23:23:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:23:57,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:57,636 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:57,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:23:57,636 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1656582534, now seen corresponding path program 10 times [2021-05-02 23:23:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382926422] [2021-05-02 23:23:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:57,641 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:57,642 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:58,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:58,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382926422] [2021-05-02 23:23:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [382926422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:58,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:58,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:23:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137823549] [2021-05-02 23:23:58,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:23:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:23:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:23:58,034 INFO L87 Difference]: Start difference. First operand 2735 states and 3036 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:36,543 INFO L93 Difference]: Finished difference Result 14898 states and 17081 transitions. [2021-05-02 23:24:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:24:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:24:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:36,562 INFO L225 Difference]: With dead ends: 14898 [2021-05-02 23:24:36,563 INFO L226 Difference]: Without dead ends: 14831 [2021-05-02 23:24:36,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:24:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14831 states. [2021-05-02 23:24:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14831 to 2739. [2021-05-02 23:24:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2734 states have (on average 1.111192392099488) internal successors, (3038), 2734 states have internal predecessors, (3038), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3042 transitions. [2021-05-02 23:24:41,273 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3042 transitions. Word has length 100 [2021-05-02 23:24:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:41,273 INFO L480 AbstractCegarLoop]: Abstraction has 2739 states and 3042 transitions. [2021-05-02 23:24:41,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3042 transitions. [2021-05-02 23:24:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:24:41,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:41,276 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:41,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:24:41,276 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1862729187, now seen corresponding path program 48 times [2021-05-02 23:24:41,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:41,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022091131] [2021-05-02 23:24:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:41,281 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:41,283 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:41,509 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:41,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022091131] [2021-05-02 23:24:41,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022091131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:41,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:41,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:24:41,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411895084] [2021-05-02 23:24:41,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:24:41,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:24:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:24:41,510 INFO L87 Difference]: Start difference. First operand 2739 states and 3042 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:59,314 INFO L93 Difference]: Finished difference Result 6465 states and 7317 transitions. [2021-05-02 23:24:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:24:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:24:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:59,326 INFO L225 Difference]: With dead ends: 6465 [2021-05-02 23:24:59,326 INFO L226 Difference]: Without dead ends: 6235 [2021-05-02 23:24:59,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:24:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6235 states. [2021-05-02 23:25:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6235 to 2739. [2021-05-02 23:25:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2734 states have (on average 1.111192392099488) internal successors, (3038), 2734 states have internal predecessors, (3038), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3042 transitions. [2021-05-02 23:25:05,544 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3042 transitions. Word has length 101 [2021-05-02 23:25:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:05,544 INFO L480 AbstractCegarLoop]: Abstraction has 2739 states and 3042 transitions. [2021-05-02 23:25:05,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3042 transitions. [2021-05-02 23:25:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:25:05,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:05,548 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:05,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:25:05,549 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:05,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2110549810, now seen corresponding path program 49 times [2021-05-02 23:25:05,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:05,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272960371] [2021-05-02 23:25:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:05,556 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:05,557 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:05,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:05,995 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272960371] [2021-05-02 23:25:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272960371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:05,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:05,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:25:05,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862908228] [2021-05-02 23:25:05,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:25:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:25:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:25:05,996 INFO L87 Difference]: Start difference. First operand 2739 states and 3042 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:43,408 INFO L93 Difference]: Finished difference Result 11874 states and 13549 transitions. [2021-05-02 23:25:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:25:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:25:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:43,432 INFO L225 Difference]: With dead ends: 11874 [2021-05-02 23:25:43,433 INFO L226 Difference]: Without dead ends: 11807 [2021-05-02 23:25:43,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:25:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11807 states. [2021-05-02 23:25:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11807 to 2739. [2021-05-02 23:25:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2734 states have (on average 1.111192392099488) internal successors, (3038), 2734 states have internal predecessors, (3038), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3042 transitions. [2021-05-02 23:25:49,857 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3042 transitions. Word has length 101 [2021-05-02 23:25:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:49,858 INFO L480 AbstractCegarLoop]: Abstraction has 2739 states and 3042 transitions. [2021-05-02 23:25:49,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3042 transitions. [2021-05-02 23:25:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:25:49,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:49,862 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:49,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:25:49,862 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2101733253, now seen corresponding path program 50 times [2021-05-02 23:25:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:49,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880795245] [2021-05-02 23:25:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:49,869 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:49,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:50,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:50,071 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:50,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880795245] [2021-05-02 23:25:50,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [880795245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:50,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:50,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:25:50,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835756991] [2021-05-02 23:25:50,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:25:50,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:25:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:25:50,072 INFO L87 Difference]: Start difference. First operand 2739 states and 3042 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:54,945 INFO L93 Difference]: Finished difference Result 3013 states and 3345 transitions. [2021-05-02 23:25:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:25:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:25:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:54,949 INFO L225 Difference]: With dead ends: 3013 [2021-05-02 23:25:54,950 INFO L226 Difference]: Without dead ends: 1594 [2021-05-02 23:25:54,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:25:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-05-02 23:25:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1520. [2021-05-02 23:25:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1515 states have (on average 1.1254125412541254) internal successors, (1705), 1515 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1709 transitions. [2021-05-02 23:25:58,951 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1709 transitions. Word has length 102 [2021-05-02 23:25:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:58,951 INFO L480 AbstractCegarLoop]: Abstraction has 1520 states and 1709 transitions. [2021-05-02 23:25:58,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1709 transitions. [2021-05-02 23:25:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:25:58,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:58,953 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:58,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:25:58,954 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 51 times [2021-05-02 23:25:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:58,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966157691] [2021-05-02 23:25:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:58,962 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:58,964 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:59,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:59,345 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:59,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966157691] [2021-05-02 23:25:59,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966157691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:59,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:59,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:25:59,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7591410] [2021-05-02 23:25:59,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:25:59,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:25:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:25:59,347 INFO L87 Difference]: Start difference. First operand 1520 states and 1709 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:28,575 INFO L93 Difference]: Finished difference Result 8341 states and 9530 transitions. [2021-05-02 23:26:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:26:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:26:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:28,596 INFO L225 Difference]: With dead ends: 8341 [2021-05-02 23:26:28,596 INFO L226 Difference]: Without dead ends: 8194 [2021-05-02 23:26:28,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:26:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2021-05-02 23:26:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 1520. [2021-05-02 23:26:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1515 states have (on average 1.1254125412541254) internal successors, (1705), 1515 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1709 transitions. [2021-05-02 23:26:32,936 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1709 transitions. Word has length 102 [2021-05-02 23:26:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 1520 states and 1709 transitions. [2021-05-02 23:26:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1709 transitions. [2021-05-02 23:26:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:26:32,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:32,960 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:32,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:26:32,960 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1967412989, now seen corresponding path program 52 times [2021-05-02 23:26:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:32,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839486787] [2021-05-02 23:26:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:32,967 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:32,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:33,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:34,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:34,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839486787] [2021-05-02 23:26:34,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839486787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:34,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:34,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:26:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187921649] [2021-05-02 23:26:34,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:26:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:26:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:26:34,006 INFO L87 Difference]: Start difference. First operand 1520 states and 1709 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:38,039 INFO L93 Difference]: Finished difference Result 1584 states and 1777 transitions. [2021-05-02 23:26:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:26:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:26:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:38,041 INFO L225 Difference]: With dead ends: 1584 [2021-05-02 23:26:38,041 INFO L226 Difference]: Without dead ends: 992 [2021-05-02 23:26:38,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:26:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-05-02 23:26:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2021-05-02 23:26:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.165146909827761) internal successors, (1150), 987 states have internal predecessors, (1150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1154 transitions. [2021-05-02 23:26:40,505 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1154 transitions. Word has length 103 [2021-05-02 23:26:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:40,505 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1154 transitions. [2021-05-02 23:26:40,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1154 transitions. [2021-05-02 23:26:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:26:40,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:40,507 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:40,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:26:40,507 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:40,507 INFO L82 PathProgramCache]: Analyzing trace with hash 193228328, now seen corresponding path program 53 times [2021-05-02 23:26:40,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:40,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292251336] [2021-05-02 23:26:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:40,514 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:40,516 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:40,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:40,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:40,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292251336] [2021-05-02 23:26:40,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [292251336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:40,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:40,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:26:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554342113] [2021-05-02 23:26:40,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:26:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:26:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:26:40,808 INFO L87 Difference]: Start difference. First operand 992 states and 1154 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:56,852 INFO L93 Difference]: Finished difference Result 5510 states and 6336 transitions. [2021-05-02 23:26:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:26:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:26:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:56,859 INFO L225 Difference]: With dead ends: 5510 [2021-05-02 23:26:56,859 INFO L226 Difference]: Without dead ends: 5280 [2021-05-02 23:26:56,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:26:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-05-02 23:26:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 992. [2021-05-02 23:26:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.165146909827761) internal successors, (1150), 987 states have internal predecessors, (1150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1154 transitions. [2021-05-02 23:26:59,439 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1154 transitions. Word has length 103 [2021-05-02 23:26:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:59,439 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1154 transitions. [2021-05-02 23:26:59,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1154 transitions. [2021-05-02 23:26:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:26:59,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:59,441 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:59,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:26:59,441 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash 514916627, now seen corresponding path program 54 times [2021-05-02 23:26:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:59,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646425361] [2021-05-02 23:26:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:59,448 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:59,449 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:00,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:00,008 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646425361] [2021-05-02 23:27:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [646425361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:00,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:00,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:27:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883037308] [2021-05-02 23:27:00,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:27:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:27:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:27:00,010 INFO L87 Difference]: Start difference. First operand 992 states and 1154 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:38,341 INFO L93 Difference]: Finished difference Result 10853 states and 12492 transitions. [2021-05-02 23:27:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:27:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:27:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:38,364 INFO L225 Difference]: With dead ends: 10853 [2021-05-02 23:27:38,364 INFO L226 Difference]: Without dead ends: 10786 [2021-05-02 23:27:38,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:27:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2021-05-02 23:27:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 992. [2021-05-02 23:27:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.165146909827761) internal successors, (1150), 987 states have internal predecessors, (1150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1154 transitions. [2021-05-02 23:27:41,787 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1154 transitions. Word has length 103 [2021-05-02 23:27:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:41,787 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1154 transitions. [2021-05-02 23:27:41,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1154 transitions. [2021-05-02 23:27:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:27:41,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:41,789 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:41,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:27:41,789 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1978314966, now seen corresponding path program 55 times [2021-05-02 23:27:41,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:41,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412359936] [2021-05-02 23:27:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:41,796 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:41,798 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:42,168 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2021-05-02 23:27:43,206 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-05-02 23:27:43,412 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2021-05-02 23:27:43,664 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 40 [2021-05-02 23:27:43,940 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 29 [2021-05-02 23:27:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:44,662 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412359936] [2021-05-02 23:27:44,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [412359936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:44,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:44,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:27:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787696265] [2021-05-02 23:27:44,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:27:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:27:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:27:44,664 INFO L87 Difference]: Start difference. First operand 992 states and 1154 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:02,642 INFO L93 Difference]: Finished difference Result 4044 states and 4711 transitions. [2021-05-02 23:28:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:28:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 23:28:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:02,651 INFO L225 Difference]: With dead ends: 4044 [2021-05-02 23:28:02,651 INFO L226 Difference]: Without dead ends: 4039 [2021-05-02 23:28:02,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 3575.5ms TimeCoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:28:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-05-02 23:28:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 1624. [2021-05-02 23:28:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1619 states have (on average 1.1636812847436688) internal successors, (1884), 1619 states have internal predecessors, (1884), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 1888 transitions. [2021-05-02 23:28:08,641 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 1888 transitions. Word has length 104 [2021-05-02 23:28:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:08,641 INFO L480 AbstractCegarLoop]: Abstraction has 1624 states and 1888 transitions. [2021-05-02 23:28:08,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 1888 transitions. [2021-05-02 23:28:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:28:08,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:08,644 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:08,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:28:08,644 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1671312486, now seen corresponding path program 56 times [2021-05-02 23:28:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:08,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089303340] [2021-05-02 23:28:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:08,652 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:08,653 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:09,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:09,317 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:09,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089303340] [2021-05-02 23:28:09,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089303340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:09,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:09,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:28:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313969261] [2021-05-02 23:28:09,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:28:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:28:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:28:09,319 INFO L87 Difference]: Start difference. First operand 1624 states and 1888 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:18,182 INFO L93 Difference]: Finished difference Result 2367 states and 2736 transitions. [2021-05-02 23:28:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:28:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 23:28:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:18,191 INFO L225 Difference]: With dead ends: 2367 [2021-05-02 23:28:18,191 INFO L226 Difference]: Without dead ends: 2362 [2021-05-02 23:28:18,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 584.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:28:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-05-02 23:28:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1054. [2021-05-02 23:28:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1049 states have (on average 1.1649189704480458) internal successors, (1222), 1049 states have internal predecessors, (1222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1226 transitions. [2021-05-02 23:28:21,436 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1226 transitions. Word has length 104 [2021-05-02 23:28:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:21,436 INFO L480 AbstractCegarLoop]: Abstraction has 1054 states and 1226 transitions. [2021-05-02 23:28:21,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:21,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1226 transitions. [2021-05-02 23:28:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:28:21,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:21,438 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:21,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:28:21,438 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1582654790, now seen corresponding path program 57 times [2021-05-02 23:28:21,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:21,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222382754] [2021-05-02 23:28:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:21,443 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:21,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:21,651 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:21,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222382754] [2021-05-02 23:28:21,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222382754] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:21,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:21,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:28:21,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659118988] [2021-05-02 23:28:21,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:28:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:28:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:28:21,652 INFO L87 Difference]: Start difference. First operand 1054 states and 1226 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:30,395 INFO L93 Difference]: Finished difference Result 1697 states and 1963 transitions. [2021-05-02 23:28:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:28:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:28:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:30,398 INFO L225 Difference]: With dead ends: 1697 [2021-05-02 23:28:30,398 INFO L226 Difference]: Without dead ends: 1692 [2021-05-02 23:28:30,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:28:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-05-02 23:28:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1222. [2021-05-02 23:28:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1217 states have (on average 1.162695152013147) internal successors, (1415), 1217 states have internal predecessors, (1415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1419 transitions. [2021-05-02 23:28:34,375 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1419 transitions. Word has length 114 [2021-05-02 23:28:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:34,375 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 1419 transitions. [2021-05-02 23:28:34,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1419 transitions. [2021-05-02 23:28:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:28:34,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:34,377 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:34,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:28:34,377 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 995848776, now seen corresponding path program 58 times [2021-05-02 23:28:34,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:34,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345907395] [2021-05-02 23:28:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:34,384 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:34,385 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:35,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:35,818 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:35,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345907395] [2021-05-02 23:28:35,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [345907395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:35,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:35,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:28:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418452196] [2021-05-02 23:28:35,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:28:35,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:35,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:28:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:28:35,819 INFO L87 Difference]: Start difference. First operand 1222 states and 1419 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:50,747 INFO L93 Difference]: Finished difference Result 3384 states and 3904 transitions. [2021-05-02 23:28:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:28:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:28:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:50,751 INFO L225 Difference]: With dead ends: 3384 [2021-05-02 23:28:50,751 INFO L226 Difference]: Without dead ends: 3304 [2021-05-02 23:28:50,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1457.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:28:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-05-02 23:28:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2104. [2021-05-02 23:28:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2099 states have (on average 1.1562648880419246) internal successors, (2427), 2099 states have internal predecessors, (2427), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2431 transitions. [2021-05-02 23:28:57,710 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2431 transitions. Word has length 114 [2021-05-02 23:28:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:57,711 INFO L480 AbstractCegarLoop]: Abstraction has 2104 states and 2431 transitions. [2021-05-02 23:28:57,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 24 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2431 transitions. [2021-05-02 23:28:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:28:57,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:57,713 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:57,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:28:57,713 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -222783544, now seen corresponding path program 59 times [2021-05-02 23:28:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994775109] [2021-05-02 23:28:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:57,718 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:57,719 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:58,347 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 42 [2021-05-02 23:28:59,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:59,179 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:59,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994775109] [2021-05-02 23:28:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [994775109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:59,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:59,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:28:59,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052832106] [2021-05-02 23:28:59,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:28:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:28:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:28:59,181 INFO L87 Difference]: Start difference. First operand 2104 states and 2431 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:16,642 INFO L93 Difference]: Finished difference Result 4321 states and 4975 transitions. [2021-05-02 23:29:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:29:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:29:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:16,649 INFO L225 Difference]: With dead ends: 4321 [2021-05-02 23:29:16,649 INFO L226 Difference]: Without dead ends: 4148 [2021-05-02 23:29:16,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1582.5ms TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:29:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-05-02 23:29:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3138. [2021-05-02 23:29:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3133 states have (on average 1.1516118736035748) internal successors, (3608), 3133 states have internal predecessors, (3608), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 3612 transitions. [2021-05-02 23:29:28,094 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 3612 transitions. Word has length 114 [2021-05-02 23:29:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:28,094 INFO L480 AbstractCegarLoop]: Abstraction has 3138 states and 3612 transitions. [2021-05-02 23:29:28,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 3612 transitions. [2021-05-02 23:29:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:29:28,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:28,098 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:28,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:29:28,099 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1510268232, now seen corresponding path program 60 times [2021-05-02 23:29:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:28,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204945885] [2021-05-02 23:29:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:28,105 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:28,105 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,924 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2021-05-02 23:29:29,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:29,606 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:29,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204945885] [2021-05-02 23:29:29,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [204945885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:29,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:29,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:29:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655230368] [2021-05-02 23:29:29,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:29:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:29:29,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:29:29,607 INFO L87 Difference]: Start difference. First operand 3138 states and 3612 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:52,811 INFO L93 Difference]: Finished difference Result 5543 states and 6370 transitions. [2021-05-02 23:29:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:29:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:29:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:52,817 INFO L225 Difference]: With dead ends: 5543 [2021-05-02 23:29:52,817 INFO L226 Difference]: Without dead ends: 5165 [2021-05-02 23:29:52,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1942.7ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:29:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states.