/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:40,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:40,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:40,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:40,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:40,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:40,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:40,748 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 23:01:40,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:40,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:40,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:40,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:40,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:40,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:40,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:40,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:40,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:40,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:40,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:40,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:40,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:40,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:40,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:40,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:40,759 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:40,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:40,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:41,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:41,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:41,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:41,022 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:41,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2021-05-02 23:01:41,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f714222c/fc2c8f3d8cf04ab3a563c5c59eab4b78/FLAG82ca2ff55 [2021-05-02 23:01:41,405 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:41,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2021-05-02 23:01:41,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f714222c/fc2c8f3d8cf04ab3a563c5c59eab4b78/FLAG82ca2ff55 [2021-05-02 23:01:41,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f714222c/fc2c8f3d8cf04ab3a563c5c59eab4b78 [2021-05-02 23:01:41,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:41,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:41,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:41,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:41,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:41,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23faa1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:41,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:41,942 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/insertion_sort-2.c[328,341] [2021-05-02 23:01:41,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:41,958 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:41,984 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/insertion_sort-2.c[328,341] [2021-05-02 23:01:42,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:42,011 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:42,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42 WrapperNode [2021-05-02 23:01:42,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:42,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:42,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:42,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:42,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (1/1) ... [2021-05-02 23:01:42,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:42,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:42,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:42,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:42,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (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 23:01:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:01:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:01:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:42,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:42,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:42,318 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 23:01:42,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:42 BoogieIcfgContainer [2021-05-02 23:01:42,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:42,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:42,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:42,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:42,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:41" (1/3) ... [2021-05-02 23:01:42,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf205ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:42, skipping insertion in model container [2021-05-02 23:01:42,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:42" (2/3) ... [2021-05-02 23:01:42,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf205ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:42, skipping insertion in model container [2021-05-02 23:01:42,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:42" (3/3) ... [2021-05-02 23:01:42,324 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2021-05-02 23:01:42,328 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:42,331 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:42,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:42,373 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:42,373 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:42,373 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:42,373 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:42,373 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:42,373 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:42,373 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:42,373 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 23:01:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:42,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,388 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,389 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2021-05-02 23:01:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928841945] [2021-05-02 23:01:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,455 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,573 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 23:01:42,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928841945] [2021-05-02 23:01:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928841945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:01:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532329229] [2021-05-02 23:01:42,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:01:42,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:01:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:42,593 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,686 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-05-02 23:01:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:01:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2021-05-02 23:01:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,691 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:01:42,691 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:01:42,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:01:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 23:01:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-02 23:01:42,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2021-05-02 23:01:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,719 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-02 23:01:42,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-02 23:01:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:42,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,720 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:42,720 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2021-05-02 23:01:42,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392195619] [2021-05-02 23:01:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,732 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,868 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 23:01:42,869 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392195619] [2021-05-02 23:01:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [392195619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:01:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371183204] [2021-05-02 23:01:42,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:01:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:01:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:42,871 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,953 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-05-02 23:01:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:01:42,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2021-05-02 23:01:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,954 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:01:42,954 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:01:42,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:01:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 23:01:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 23:01:42,966 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2021-05-02 23:01:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,967 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 23:01:42,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 23:01:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:01:42,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,969 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:42,970 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2021-05-02 23:01:42,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35155745] [2021-05-02 23:01:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,986 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:42,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,247 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 23:01:43,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35155745] [2021-05-02 23:01:43,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [35155745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382917189] [2021-05-02 23:01:43,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:43,249 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,395 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-05-02 23:01:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:01:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2021-05-02 23:01:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,397 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:01:43,397 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:01:43,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:01:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 23:01:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-05-02 23:01:43,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-05-02 23:01:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,408 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-05-02 23:01:43,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-05-02 23:01:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:01:43,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,409 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:43,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:43,409 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash 966699294, now seen corresponding path program 2 times [2021-05-02 23:01:43,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103278092] [2021-05-02 23:01:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,416 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,418 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,616 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 23:01:43,616 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103278092] [2021-05-02 23:01:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103278092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:43,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712618652] [2021-05-02 23:01:43,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:43,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:43,621 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,767 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-05-02 23:01:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 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 19 [2021-05-02 23:01:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,770 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:01:43,770 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:01:43,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:01:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2021-05-02 23:01:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-05-02 23:01:43,781 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2021-05-02 23:01:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,782 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-05-02 23:01:43,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-05-02 23:01:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:01:43,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,783 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, 1] [2021-05-02 23:01:43,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:01:43,783 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2021-05-02 23:01:43,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346710996] [2021-05-02 23:01:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,788 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,789 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,220 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 23:01:44,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:44,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346710996] [2021-05-02 23:01:44,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346710996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:44,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:44,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:01:44,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556754454] [2021-05-02 23:01:44,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:01:44,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:01:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:01:44,223 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:44,638 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2021-05-02 23:01:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:01:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2021-05-02 23:01:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:44,641 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:01:44,641 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:01:44,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:01:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2021-05-02 23:01:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-05-02 23:01:44,653 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2021-05-02 23:01:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:44,654 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-05-02 23:01:44,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-05-02 23:01:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:01:44,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:44,655 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, 1] [2021-05-02 23:01:44,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:01:44,655 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:44,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2021-05-02 23:01:44,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:44,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198792772] [2021-05-02 23:01:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:44,663 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:44,664 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,730 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 23:01:44,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:44,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198792772] [2021-05-02 23:01:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198792772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:44,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:44,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:01:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701296987] [2021-05-02 23:01:44,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:01:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:01:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:44,731 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:44,790 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-05-02 23:01:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:01:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 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 25 [2021-05-02 23:01:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:44,798 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:01:44,798 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:01:44,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:01:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-05-02 23:01:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-02 23:01:44,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2021-05-02 23:01:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:44,806 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-02 23:01:44,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-02 23:01:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:01:44,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:44,807 INFO L523 BasicCegarLoop]: trace histogram [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 23:01:44,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:01:44,807 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2021-05-02 23:01:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:44,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030545450] [2021-05-02 23:01:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:44,813 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:44,814 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,122 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 23:01:45,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030545450] [2021-05-02 23:01:45,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030545450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:01:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373735579] [2021-05-02 23:01:45,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:01:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:01:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:45,124 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 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 23:01:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:45,722 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2021-05-02 23:01:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:01:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 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 23:01:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:45,724 INFO L225 Difference]: With dead ends: 123 [2021-05-02 23:01:45,724 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:01:45,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:01:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:01:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 49. [2021-05-02 23:01:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 23:01:45,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 28 [2021-05-02 23:01:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 23:01:45,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 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 23:01:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 23:01:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:01:45,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:45,746 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:45,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:01:45,746 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:45,747 INFO L82 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2021-05-02 23:01:45,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:45,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938704394] [2021-05-02 23:01:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:45,751 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:45,753 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,842 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 23:01:45,842 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938704394] [2021-05-02 23:01:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [938704394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:45,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775607809] [2021-05-02 23:01:45,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:45,844 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:45,967 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-02 23:01:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 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 31 [2021-05-02 23:01:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:45,969 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:01:45,969 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:01:45,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:01:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-05-02 23:01:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 55 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-02 23:01:45,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 31 [2021-05-02 23:01:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:45,994 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-02 23:01:45,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-02 23:01:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:01:45,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:45,995 INFO L523 BasicCegarLoop]: trace histogram [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 23:01:45,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:01:45,995 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2021-05-02 23:01:45,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:45,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540595669] [2021-05-02 23:01:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:46,000 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:46,001 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:01:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,102 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 23:01:46,103 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540595669] [2021-05-02 23:01:46,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [540595669] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:46,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:46,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:46,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497821100] [2021-05-02 23:01:46,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:46,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:46,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:46,104 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:46,241 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-05-02 23:01:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:01:46,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-02 23:01:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:46,242 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:01:46,242 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:01:46,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:01:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2021-05-02 23:01:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-02 23:01:46,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2021-05-02 23:01:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:46,252 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-02 23:01:46,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-02 23:01:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:01:46,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:46,252 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:46,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:01:46,253 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2021-05-02 23:01:46,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:46,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980752225] [2021-05-02 23:01:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:46,257 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:46,257 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,562 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 23:01:46,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:46,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980752225] [2021-05-02 23:01:46,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980752225] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:46,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:46,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:01:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101329179] [2021-05-02 23:01:46,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:01:46,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:46,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:01:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:01:46,563 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:47,050 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-05-02 23:01:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:01:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 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 33 [2021-05-02 23:01:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:47,051 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:01:47,051 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:01:47,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:01:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:01:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-05-02 23:01:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 61 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-05-02 23:01:47,068 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 33 [2021-05-02 23:01:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:47,069 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-05-02 23:01:47,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-05-02 23:01:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:01:47,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:47,072 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:47,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:01:47,073 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2021-05-02 23:01:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:47,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268421183] [2021-05-02 23:01:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:47,078 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:47,079 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,329 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 23:01:47,329 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:47,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268421183] [2021-05-02 23:01:47,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [268421183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:47,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:47,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:01:47,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674681892] [2021-05-02 23:01:47,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:01:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:01:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:47,330 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:48,252 INFO L93 Difference]: Finished difference Result 158 states and 199 transitions. [2021-05-02 23:01:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:01:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 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 23:01:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:48,254 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:01:48,254 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:01:48,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:01:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:01:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 77. [2021-05-02 23:01:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.289855072463768) internal successors, (89), 70 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2021-05-02 23:01:48,267 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 36 [2021-05-02 23:01:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:48,267 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2021-05-02 23:01:48,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2021-05-02 23:01:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:01:48,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:48,268 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:01:48,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:01:48,269 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 350500229, now seen corresponding path program 2 times [2021-05-02 23:01:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308294915] [2021-05-02 23:01:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:48,274 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:48,275 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,337 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 23:01:48,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:48,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308294915] [2021-05-02 23:01:48,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [308294915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:48,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:48,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035243563] [2021-05-02 23:01:48,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:48,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:48,338 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:48,491 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-02 23:01:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:01:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 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 23:01:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:48,494 INFO L225 Difference]: With dead ends: 151 [2021-05-02 23:01:48,494 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 23:01:48,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:01:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 23:01:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-05-02 23:01:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 76 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-05-02 23:01:48,512 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 36 [2021-05-02 23:01:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:48,512 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-05-02 23:01:48,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-05-02 23:01:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:01:48,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:48,513 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:01:48,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:01:48,513 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 3 times [2021-05-02 23:01:48,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:48,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450948779] [2021-05-02 23:01:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:48,519 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:48,520 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,825 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 23:01:48,825 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:48,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450948779] [2021-05-02 23:01:48,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [450948779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:48,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:48,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:01:48,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958629556] [2021-05-02 23:01:48,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:01:48,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:01:48,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:01:48,826 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:49,270 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-05-02 23:01:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:01:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 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 23:01:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:49,271 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:01:49,271 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:01:49,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:01:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:01:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-05-02 23:01:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 76 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-05-02 23:01:49,282 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 36 [2021-05-02 23:01:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:49,282 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-05-02 23:01:49,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-05-02 23:01:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:01:49,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:49,283 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:49,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:01:49,283 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:49,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 4 times [2021-05-02 23:01:49,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:49,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123712655] [2021-05-02 23:01:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:49,287 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:49,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,566 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 23:01:49,566 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123712655] [2021-05-02 23:01:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [123712655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:49,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:49,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:01:49,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382554557] [2021-05-02 23:01:49,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:01:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:01:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:01:49,567 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:50,345 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2021-05-02 23:01:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:01:50,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 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 23:01:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:50,347 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:01:50,347 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 23:01:50,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:01:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 23:01:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2021-05-02 23:01:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-05-02 23:01:50,366 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 39 [2021-05-02 23:01:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:50,366 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-05-02 23:01:50,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-05-02 23:01:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:01:50,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:50,367 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:01:50,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:01:50,367 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2021-05-02 23:01:50,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:50,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905917429] [2021-05-02 23:01:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:50,371 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:50,371 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:01:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,527 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 23:01:50,528 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:50,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905917429] [2021-05-02 23:01:50,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905917429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:50,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:50,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:01:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73589384] [2021-05-02 23:01:50,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:01:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:01:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:01:50,529 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:50,954 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-05-02 23:01:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:01:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-05-02 23:01:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:50,955 INFO L225 Difference]: With dead ends: 121 [2021-05-02 23:01:50,955 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:01:50,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:01:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:01:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-05-02 23:01:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.197674418604651) internal successors, (103), 88 states have internal predecessors, (103), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-05-02 23:01:50,969 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 41 [2021-05-02 23:01:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:50,969 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-05-02 23:01:50,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-05-02 23:01:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:01:50,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:50,970 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:50,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:01:50,970 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 2 times [2021-05-02 23:01:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:50,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703773570] [2021-05-02 23:01:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:50,974 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:50,975 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,078 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 23:01:51,078 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703773570] [2021-05-02 23:01:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [703773570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:51,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:51,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:01:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077240740] [2021-05-02 23:01:51,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:01:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:01:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:51,079 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23:01:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:51,281 INFO L93 Difference]: Finished difference Result 218 states and 264 transitions. [2021-05-02 23:01:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:01:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 42 [2021-05-02 23:01:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:51,283 INFO L225 Difference]: With dead ends: 218 [2021-05-02 23:01:51,283 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:01:51,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:01:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2021-05-02 23:01:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 116 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2021-05-02 23:01:51,307 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2021-05-02 23:01:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:51,307 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2021-05-02 23:01:51,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 23:01:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2021-05-02 23:01:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:01:51,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:51,308 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 23:01:51,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:01:51,308 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2021-05-02 23:01:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:51,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720516752] [2021-05-02 23:01:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:51,312 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:51,312 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 23:01:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,480 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 23:01:51,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:51,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720516752] [2021-05-02 23:01:51,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [720516752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:51,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:51,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:01:51,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564893929] [2021-05-02 23:01:51,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:01:51,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:51,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:01:51,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:01:51,482 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:51,963 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2021-05-02 23:01:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:01:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-05-02 23:01:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:51,964 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:01:51,964 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 23:01:51,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 23:01:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2021-05-02 23:01:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 115 states have (on average 1.191304347826087) internal successors, (137), 117 states have internal predecessors, (137), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2021-05-02 23:01:51,985 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 44 [2021-05-02 23:01:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:51,985 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2021-05-02 23:01:51,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2021-05-02 23:01:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:01:51,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:51,985 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:51,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:01:51,985 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 3 times [2021-05-02 23:01:51,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:51,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62238692] [2021-05-02 23:01:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:51,990 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:51,992 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:52,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:52,410 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 23:01:52,410 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:52,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62238692] [2021-05-02 23:01:52,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [62238692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:52,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:52,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:01:52,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902035436] [2021-05-02 23:01:52,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:01:52,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:01:52,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:01:52,411 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 23:01:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:53,245 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2021-05-02 23:01:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:01:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 44 [2021-05-02 23:01:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:53,247 INFO L225 Difference]: With dead ends: 212 [2021-05-02 23:01:53,247 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 23:01:53,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:01:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 23:01:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 136. [2021-05-02 23:01:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 125 states have (on average 1.2) internal successors, (150), 127 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2021-05-02 23:01:53,271 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 44 [2021-05-02 23:01:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:53,271 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2021-05-02 23:01:53,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 23:01:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2021-05-02 23:01:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:01:53,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:53,272 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:53,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:01:53,272 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 4 times [2021-05-02 23:01:53,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:53,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350091890] [2021-05-02 23:01:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:53,275 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:53,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,653 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 23:01:53,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350091890] [2021-05-02 23:01:53,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [350091890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:53,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:53,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:01:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014332755] [2021-05-02 23:01:53,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:01:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:01:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:01:53,654 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 23:01:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:54,735 INFO L93 Difference]: Finished difference Result 265 states and 319 transitions. [2021-05-02 23:01:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:01:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 44 [2021-05-02 23:01:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:54,737 INFO L225 Difference]: With dead ends: 265 [2021-05-02 23:01:54,737 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:01:54,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:01:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:01:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2021-05-02 23:01:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 147 states have (on average 1.2244897959183674) internal successors, (180), 149 states have internal predecessors, (180), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 191 transitions. [2021-05-02 23:01:54,774 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 191 transitions. Word has length 44 [2021-05-02 23:01:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:54,774 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 191 transitions. [2021-05-02 23:01:54,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 23:01:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 191 transitions. [2021-05-02 23:01:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:01:54,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:54,775 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:01:54,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:01:54,775 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:54,775 INFO L82 PathProgramCache]: Analyzing trace with hash -172816864, now seen corresponding path program 5 times [2021-05-02 23:01:54,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:54,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238522861] [2021-05-02 23:01:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:54,778 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:54,779 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,174 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 23:01:55,174 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238522861] [2021-05-02 23:01:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [238522861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:01:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679392735] [2021-05-02 23:01:55,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:01:55,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:01:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:01:55,176 INFO L87 Difference]: Start difference. First operand 158 states and 191 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 19 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 23:01:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:55,892 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 23:01:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:01:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 19 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 44 [2021-05-02 23:01:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:55,894 INFO L225 Difference]: With dead ends: 214 [2021-05-02 23:01:55,894 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:01:55,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:01:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:01:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 183. [2021-05-02 23:01:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 170 states have (on average 1.2176470588235293) internal successors, (207), 173 states have internal predecessors, (207), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:01:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-05-02 23:01:55,925 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 44 [2021-05-02 23:01:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:55,925 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-05-02 23:01:55,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 19 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 23:01:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-05-02 23:01:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:01:55,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:55,925 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:01:55,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:01:55,926 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 1 times [2021-05-02 23:01:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801557714] [2021-05-02 23:01:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:55,929 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:55,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-02 23:01:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,540 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 23:01:56,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801557714] [2021-05-02 23:01:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [801557714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:56,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:56,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:01:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513379789] [2021-05-02 23:01:56,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:01:56,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:01:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:56,542 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:58,359 INFO L93 Difference]: Finished difference Result 314 states and 377 transitions. [2021-05-02 23:01:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:01:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2021-05-02 23:01:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:58,361 INFO L225 Difference]: With dead ends: 314 [2021-05-02 23:01:58,361 INFO L226 Difference]: Without dead ends: 312 [2021-05-02 23:01:58,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1569.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3392, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:01:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-02 23:01:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 233. [2021-05-02 23:01:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 215 states have (on average 1.2093023255813953) internal successors, (260), 221 states have internal predecessors, (260), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:01:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 281 transitions. [2021-05-02 23:01:58,408 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 281 transitions. Word has length 47 [2021-05-02 23:01:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,413 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 281 transitions. [2021-05-02 23:01:58,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 281 transitions. [2021-05-02 23:01:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:01:58,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,414 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:01:58,414 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2021-05-02 23:01:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938503377] [2021-05-02 23:01:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:58,424 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:58,425 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:01:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:01:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,525 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 23:01:58,525 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938503377] [2021-05-02 23:01:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [938503377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:58,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:58,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:01:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977040962] [2021-05-02 23:01:58,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:01:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:01:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:58,526 INFO L87 Difference]: Start difference. First operand 233 states and 281 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:58,785 INFO L93 Difference]: Finished difference Result 283 states and 339 transitions. [2021-05-02 23:01:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:01:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-05-02 23:01:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:58,790 INFO L225 Difference]: With dead ends: 283 [2021-05-02 23:01:58,790 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 23:01:58,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 23:01:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-05-02 23:01:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 194 states have (on average 1.190721649484536) internal successors, (231), 199 states have internal predecessors, (231), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:01:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2021-05-02 23:01:58,828 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 49 [2021-05-02 23:01:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,828 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2021-05-02 23:01:58,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2021-05-02 23:01:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:01:58,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,829 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:01:58,829 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 5 times [2021-05-02 23:01:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432939248] [2021-05-02 23:01:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:58,833 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:58,834 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:59,050 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 23:01:59,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:59,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432939248] [2021-05-02 23:01:59,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [432939248] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:59,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:59,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:01:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608116980] [2021-05-02 23:01:59,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:01:59,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:01:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:01:59,051 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 23:02:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:00,067 INFO L93 Difference]: Finished difference Result 322 states and 389 transitions. [2021-05-02 23:02:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:02:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 47 [2021-05-02 23:02:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:00,069 INFO L225 Difference]: With dead ends: 322 [2021-05-02 23:02:00,069 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 23:02:00,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=658, Invalid=2422, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:02:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 23:02:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 230. [2021-05-02 23:02:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 212 states have (on average 1.1981132075471699) internal successors, (254), 218 states have internal predecessors, (254), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:02:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 274 transitions. [2021-05-02 23:02:00,115 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 274 transitions. Word has length 47 [2021-05-02 23:02:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:00,115 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 274 transitions. [2021-05-02 23:02:00,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 23:02:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 274 transitions. [2021-05-02 23:02:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:02:00,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:00,116 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:00,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:02:00,116 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 6 times [2021-05-02 23:02:00,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:00,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112246821] [2021-05-02 23:02:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:00,121 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:00,122 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,177 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 23:02:00,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112246821] [2021-05-02 23:02:00,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112246821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:00,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:02:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78962822] [2021-05-02 23:02:00,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:02:00,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:02:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:02:00,178 INFO L87 Difference]: Start difference. First operand 230 states and 274 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 23:02:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:00,454 INFO L93 Difference]: Finished difference Result 379 states and 463 transitions. [2021-05-02 23:02:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:02:00,455 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 47 [2021-05-02 23:02:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:00,456 INFO L225 Difference]: With dead ends: 379 [2021-05-02 23:02:00,456 INFO L226 Difference]: Without dead ends: 287 [2021-05-02 23:02:00,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-05-02 23:02:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 238. [2021-05-02 23:02:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 220 states have (on average 1.2) internal successors, (264), 226 states have internal predecessors, (264), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:02:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2021-05-02 23:02:00,515 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 47 [2021-05-02 23:02:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:00,515 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2021-05-02 23:02:00,515 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 23:02:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2021-05-02 23:02:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:02:00,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:00,519 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:00,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:02:00,519 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:00,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 6 times [2021-05-02 23:02:00,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:00,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856849441] [2021-05-02 23:02:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:00,523 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:00,525 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,985 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 23:02:00,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:00,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856849441] [2021-05-02 23:02:00,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856849441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128269733] [2021-05-02 23:02:00,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:00,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:00,986 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 19 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 23:02:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,882 INFO L93 Difference]: Finished difference Result 283 states and 336 transitions. [2021-05-02 23:02:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:02:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 19 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 47 [2021-05-02 23:02:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,884 INFO L225 Difference]: With dead ends: 283 [2021-05-02 23:02:01,884 INFO L226 Difference]: Without dead ends: 281 [2021-05-02 23:02:01,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 695.1ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:02:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-02 23:02:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-05-02 23:02:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 223 states have (on average 1.201793721973094) internal successors, (268), 229 states have internal predecessors, (268), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:02:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 288 transitions. [2021-05-02 23:02:01,928 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 288 transitions. Word has length 47 [2021-05-02 23:02:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,928 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 288 transitions. [2021-05-02 23:02:01,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 19 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 23:02:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 288 transitions. [2021-05-02 23:02:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:02:01,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,929 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:01,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:02:01,929 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 7 times [2021-05-02 23:02:01,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936297590] [2021-05-02 23:02:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,936 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,937 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:02,377 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 23:02:02,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:02,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936297590] [2021-05-02 23:02:02,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936297590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:02,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:02,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:02:02,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816278261] [2021-05-02 23:02:02,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:02:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:02:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:02,379 INFO L87 Difference]: Start difference. First operand 241 states and 288 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 23:02:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:03,952 INFO L93 Difference]: Finished difference Result 409 states and 492 transitions. [2021-05-02 23:02:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:02:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 47 [2021-05-02 23:02:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:03,957 INFO L225 Difference]: With dead ends: 409 [2021-05-02 23:02:03,957 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 23:02:03,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1250.6ms TimeCoverageRelationStatistics Valid=482, Invalid=2598, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:02:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 23:02:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 238. [2021-05-02 23:02:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 221 states have (on average 1.2036199095022624) internal successors, (266), 226 states have internal predecessors, (266), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:02:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2021-05-02 23:02:04,005 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 47 [2021-05-02 23:02:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:04,006 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2021-05-02 23:02:04,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 23:02:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2021-05-02 23:02:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:02:04,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:04,006 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:04,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:02:04,006 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:04,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 8 times [2021-05-02 23:02:04,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:04,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817834039] [2021-05-02 23:02:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:04,011 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:04,011 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,394 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 23:02:04,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817834039] [2021-05-02 23:02:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817834039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:04,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:04,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:04,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534737496] [2021-05-02 23:02:04,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:04,396 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23:02:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:05,077 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2021-05-02 23:02:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:02:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 47 [2021-05-02 23:02:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:05,078 INFO L225 Difference]: With dead ends: 288 [2021-05-02 23:02:05,078 INFO L226 Difference]: Without dead ends: 286 [2021-05-02 23:02:05,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-02 23:02:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 238. [2021-05-02 23:02:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 221 states have (on average 1.2036199095022624) internal successors, (266), 226 states have internal predecessors, (266), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:02:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2021-05-02 23:02:05,126 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 47 [2021-05-02 23:02:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:05,126 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2021-05-02 23:02:05,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23:02:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2021-05-02 23:02:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:02:05,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:05,127 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 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] [2021-05-02 23:02:05,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:02:05,127 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 2 times [2021-05-02 23:02:05,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:05,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714636002] [2021-05-02 23:02:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:05,131 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:05,131 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 23:02:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,763 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 23:02:05,763 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:05,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714636002] [2021-05-02 23:02:05,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714636002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:05,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:05,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632510158] [2021-05-02 23:02:05,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:05,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:05,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:05,764 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,124 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2021-05-02 23:02:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:02:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-05-02 23:02:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,126 INFO L225 Difference]: With dead ends: 248 [2021-05-02 23:02:07,126 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 23:02:07,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1293.3ms TimeCoverageRelationStatistics Valid=370, Invalid=2282, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:02:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 23:02:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2021-05-02 23:02:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 194 states have internal predecessors, (233), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 248 transitions. [2021-05-02 23:02:07,164 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 248 transitions. Word has length 50 [2021-05-02 23:02:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,164 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 248 transitions. [2021-05-02 23:02:07,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 248 transitions. [2021-05-02 23:02:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:02:07,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,165 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:02:07,165 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 7 times [2021-05-02 23:02:07,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909344437] [2021-05-02 23:02:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,170 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:07,171 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,306 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 23:02:07,306 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909344437] [2021-05-02 23:02:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909344437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:02:07,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507880841] [2021-05-02 23:02:07,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:02:07,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:02:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:07,307 INFO L87 Difference]: Start difference. First operand 204 states and 248 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 23:02:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,649 INFO L93 Difference]: Finished difference Result 489 states and 603 transitions. [2021-05-02 23:02:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:02:07,650 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 50 [2021-05-02 23:02:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,651 INFO L225 Difference]: With dead ends: 489 [2021-05-02 23:02:07,651 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 23:02:07,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:02:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 23:02:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 289. [2021-05-02 23:02:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 275 states have (on average 1.2072727272727273) internal successors, (332), 279 states have internal predecessors, (332), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 347 transitions. [2021-05-02 23:02:07,706 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 347 transitions. Word has length 50 [2021-05-02 23:02:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,706 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 347 transitions. [2021-05-02 23:02:07,706 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 23:02:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 347 transitions. [2021-05-02 23:02:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:02:07,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,707 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:02:07,707 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 9 times [2021-05-02 23:02:07,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865602022] [2021-05-02 23:02:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,711 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:07,711 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:08,002 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 23:02:08,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:08,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865602022] [2021-05-02 23:02:08,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865602022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:08,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:08,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869494570] [2021-05-02 23:02:08,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:08,003 INFO L87 Difference]: Start difference. First operand 289 states and 347 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:02:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:09,068 INFO L93 Difference]: Finished difference Result 500 states and 608 transitions. [2021-05-02 23:02:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:02:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 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 50 [2021-05-02 23:02:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:09,070 INFO L225 Difference]: With dead ends: 500 [2021-05-02 23:02:09,070 INFO L226 Difference]: Without dead ends: 392 [2021-05-02 23:02:09,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 792.7ms TimeCoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:02:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-02 23:02:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 290. [2021-05-02 23:02:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.1992753623188406) internal successors, (331), 280 states have internal predecessors, (331), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 346 transitions. [2021-05-02 23:02:09,125 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 346 transitions. Word has length 50 [2021-05-02 23:02:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:09,126 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 346 transitions. [2021-05-02 23:02:09,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:02:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 346 transitions. [2021-05-02 23:02:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:02:09,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:09,126 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:09,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:02:09,126 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 10 times [2021-05-02 23:02:09,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:09,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664622856] [2021-05-02 23:02:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:09,130 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:09,131 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,544 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 23:02:09,544 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:09,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664622856] [2021-05-02 23:02:09,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [664622856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:09,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:09,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:09,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777794544] [2021-05-02 23:02:09,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:09,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:09,545 INFO L87 Difference]: Start difference. First operand 290 states and 346 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 23:02:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:10,336 INFO L93 Difference]: Finished difference Result 356 states and 424 transitions. [2021-05-02 23:02:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:02:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 50 [2021-05-02 23:02:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:10,346 INFO L225 Difference]: With dead ends: 356 [2021-05-02 23:02:10,346 INFO L226 Difference]: Without dead ends: 354 [2021-05-02 23:02:10,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:02:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-02 23:02:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 281. [2021-05-02 23:02:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 267 states have (on average 1.198501872659176) internal successors, (320), 271 states have internal predecessors, (320), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 335 transitions. [2021-05-02 23:02:10,400 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 335 transitions. Word has length 50 [2021-05-02 23:02:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:10,400 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 335 transitions. [2021-05-02 23:02:10,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 23:02:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 335 transitions. [2021-05-02 23:02:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:02:10,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:10,401 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:10,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:02:10,401 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2021-05-02 23:02:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:10,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786315178] [2021-05-02 23:02:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:10,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:10,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 23:02:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,584 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 23:02:10,584 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:10,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786315178] [2021-05-02 23:02:10,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786315178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:10,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:10,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:02:10,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450503032] [2021-05-02 23:02:10,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:02:10,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:02:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:02:10,586 INFO L87 Difference]: Start difference. First operand 281 states and 335 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:11,503 INFO L93 Difference]: Finished difference Result 394 states and 470 transitions. [2021-05-02 23:02:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:02:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-05-02 23:02:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:11,504 INFO L225 Difference]: With dead ends: 394 [2021-05-02 23:02:11,504 INFO L226 Difference]: Without dead ends: 392 [2021-05-02 23:02:11,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-02 23:02:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 313. [2021-05-02 23:02:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 295 states have (on average 1.193220338983051) internal successors, (352), 301 states have internal predecessors, (352), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 373 transitions. [2021-05-02 23:02:11,569 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 373 transitions. Word has length 52 [2021-05-02 23:02:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:11,570 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 373 transitions. [2021-05-02 23:02:11,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 373 transitions. [2021-05-02 23:02:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:02:11,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:11,570 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:11,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:02:11,571 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2021-05-02 23:02:11,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:11,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713193265] [2021-05-02 23:02:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:11,574 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:11,575 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:11,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 23:02:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,005 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 23:02:12,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:12,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713193265] [2021-05-02 23:02:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713193265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:12,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:12,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:02:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772528707] [2021-05-02 23:02:12,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:02:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:02:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:02:12,006 INFO L87 Difference]: Start difference. First operand 313 states and 373 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:13,194 INFO L93 Difference]: Finished difference Result 401 states and 476 transitions. [2021-05-02 23:02:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-05-02 23:02:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:13,196 INFO L225 Difference]: With dead ends: 401 [2021-05-02 23:02:13,196 INFO L226 Difference]: Without dead ends: 399 [2021-05-02 23:02:13,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 878.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-02 23:02:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 307. [2021-05-02 23:02:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 289 states have (on average 1.193771626297578) internal successors, (345), 295 states have internal predecessors, (345), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 366 transitions. [2021-05-02 23:02:13,262 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 366 transitions. Word has length 52 [2021-05-02 23:02:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:13,262 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 366 transitions. [2021-05-02 23:02:13,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 366 transitions. [2021-05-02 23:02:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:02:13,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:13,263 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:13,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:02:13,263 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 8 times [2021-05-02 23:02:13,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:13,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122411532] [2021-05-02 23:02:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:13,268 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:13,269 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:13,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:13,930 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 23:02:13,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:13,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122411532] [2021-05-02 23:02:13,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122411532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:13,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:13,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:13,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757363854] [2021-05-02 23:02:13,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:13,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:13,931 INFO L87 Difference]: Start difference. First operand 307 states and 366 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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 23:02:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:15,298 INFO L93 Difference]: Finished difference Result 601 states and 733 transitions. [2021-05-02 23:02:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:02:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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 52 [2021-05-02 23:02:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:15,300 INFO L225 Difference]: With dead ends: 601 [2021-05-02 23:02:15,300 INFO L226 Difference]: Without dead ends: 502 [2021-05-02 23:02:15,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-05-02 23:02:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 377. [2021-05-02 23:02:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 359 states have (on average 1.2200557103064067) internal successors, (438), 365 states have internal predecessors, (438), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 459 transitions. [2021-05-02 23:02:15,378 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 459 transitions. Word has length 52 [2021-05-02 23:02:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:15,378 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 459 transitions. [2021-05-02 23:02:15,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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 23:02:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 459 transitions. [2021-05-02 23:02:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:02:15,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:15,379 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:15,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:02:15,379 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:15,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 9 times [2021-05-02 23:02:15,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:15,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737366427] [2021-05-02 23:02:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:15,383 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:15,383 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,966 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 23:02:15,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737366427] [2021-05-02 23:02:15,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [737366427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:15,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:15,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694808341] [2021-05-02 23:02:15,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:15,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:15,967 INFO L87 Difference]: Start difference. First operand 377 states and 459 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 23:02:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:17,110 INFO L93 Difference]: Finished difference Result 528 states and 639 transitions. [2021-05-02 23:02:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 52 [2021-05-02 23:02:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:17,112 INFO L225 Difference]: With dead ends: 528 [2021-05-02 23:02:17,112 INFO L226 Difference]: Without dead ends: 378 [2021-05-02 23:02:17,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 921.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-02 23:02:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-05-02 23:02:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 286 states have (on average 1.1783216783216783) internal successors, (337), 292 states have internal predecessors, (337), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 358 transitions. [2021-05-02 23:02:17,182 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 358 transitions. Word has length 52 [2021-05-02 23:02:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:17,182 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 358 transitions. [2021-05-02 23:02:17,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 23:02:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 358 transitions. [2021-05-02 23:02:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:02:17,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:17,183 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:17,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:02:17,183 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2038277613, now seen corresponding path program 10 times [2021-05-02 23:02:17,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:17,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365162940] [2021-05-02 23:02:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:17,187 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:17,188 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,661 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 23:02:17,661 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:17,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365162940] [2021-05-02 23:02:17,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365162940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:17,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:17,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:02:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716186132] [2021-05-02 23:02:17,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:02:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:02:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:17,662 INFO L87 Difference]: Start difference. First operand 305 states and 358 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 23:02:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:18,732 INFO L93 Difference]: Finished difference Result 441 states and 523 transitions. [2021-05-02 23:02:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:02:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 52 [2021-05-02 23:02:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:18,734 INFO L225 Difference]: With dead ends: 441 [2021-05-02 23:02:18,735 INFO L226 Difference]: Without dead ends: 439 [2021-05-02 23:02:18,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-02 23:02:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-05-02 23:02:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 292 states have (on average 1.178082191780822) internal successors, (344), 298 states have internal predecessors, (344), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2021-05-02 23:02:18,809 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 52 [2021-05-02 23:02:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:18,809 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2021-05-02 23:02:18,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 23:02:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2021-05-02 23:02:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:18,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:18,810 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2021-05-02 23:02:18,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:02:18,810 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2021-05-02 23:02:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:18,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58505905] [2021-05-02 23:02:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:18,816 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:18,816 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:18,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 23:02:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,002 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 23:02:19,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:19,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58505905] [2021-05-02 23:02:19,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [58505905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:19,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:19,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:02:19,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650618483] [2021-05-02 23:02:19,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:02:19,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:02:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:02:19,003 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:20,079 INFO L93 Difference]: Finished difference Result 411 states and 485 transitions. [2021-05-02 23:02:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:02:20,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-05-02 23:02:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:20,087 INFO L225 Difference]: With dead ends: 411 [2021-05-02 23:02:20,087 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 23:02:20,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 542.9ms TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 23:02:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 311. [2021-05-02 23:02:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 292 states have (on average 1.178082191780822) internal successors, (344), 298 states have internal predecessors, (344), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:02:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2021-05-02 23:02:20,161 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 55 [2021-05-02 23:02:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:20,161 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2021-05-02 23:02:20,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2021-05-02 23:02:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:02:20,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:20,162 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:20,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:02:20,162 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 4 times [2021-05-02 23:02:20,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:20,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316626878] [2021-05-02 23:02:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:20,167 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:20,168 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:02:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:02:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,517 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 23:02:20,518 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:20,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316626878] [2021-05-02 23:02:20,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316626878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:20,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:20,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:02:20,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624011719] [2021-05-02 23:02:20,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:02:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:02:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:20,519 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:21,202 INFO L93 Difference]: Finished difference Result 385 states and 454 transitions. [2021-05-02 23:02:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:02:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-05-02 23:02:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:21,204 INFO L225 Difference]: With dead ends: 385 [2021-05-02 23:02:21,204 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 23:02:21,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 23:02:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 358. [2021-05-02 23:02:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 330 states have (on average 1.1666666666666667) internal successors, (385), 340 states have internal predecessors, (385), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:02:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 422 transitions. [2021-05-02 23:02:21,297 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 422 transitions. Word has length 57 [2021-05-02 23:02:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:21,298 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 422 transitions. [2021-05-02 23:02:21,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 422 transitions. [2021-05-02 23:02:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:21,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:21,299 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:21,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:02:21,299 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 11 times [2021-05-02 23:02:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:21,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536657112] [2021-05-02 23:02:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:21,302 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:21,303 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,098 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 23:02:22,098 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:22,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536657112] [2021-05-02 23:02:22,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [536657112] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:22,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:22,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:22,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438114360] [2021-05-02 23:02:22,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:22,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:22,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:22,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:22,099 INFO L87 Difference]: Start difference. First operand 358 states and 422 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 23:02:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:23,668 INFO L93 Difference]: Finished difference Result 540 states and 643 transitions. [2021-05-02 23:02:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:02:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 55 [2021-05-02 23:02:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:23,670 INFO L225 Difference]: With dead ends: 540 [2021-05-02 23:02:23,670 INFO L226 Difference]: Without dead ends: 538 [2021-05-02 23:02:23,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1323.5ms TimeCoverageRelationStatistics Valid=303, Invalid=2453, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:02:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-05-02 23:02:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 397. [2021-05-02 23:02:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 365 states have (on average 1.16986301369863) internal successors, (427), 377 states have internal predecessors, (427), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 468 transitions. [2021-05-02 23:02:23,783 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 468 transitions. Word has length 55 [2021-05-02 23:02:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:23,783 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 468 transitions. [2021-05-02 23:02:23,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 23:02:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 468 transitions. [2021-05-02 23:02:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:23,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:23,784 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:23,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:02:23,784 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 12 times [2021-05-02 23:02:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:23,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724918742] [2021-05-02 23:02:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:23,789 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:23,790 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,269 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 23:02:24,269 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724918742] [2021-05-02 23:02:24,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [724918742] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:24,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:24,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:24,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295339302] [2021-05-02 23:02:24,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:24,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:24,270 INFO L87 Difference]: Start difference. First operand 397 states and 468 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:02:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:25,815 INFO L93 Difference]: Finished difference Result 498 states and 590 transitions. [2021-05-02 23:02:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:02:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 55 [2021-05-02 23:02:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:25,817 INFO L225 Difference]: With dead ends: 498 [2021-05-02 23:02:25,817 INFO L226 Difference]: Without dead ends: 496 [2021-05-02 23:02:25,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1149.3ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:02:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-05-02 23:02:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 406. [2021-05-02 23:02:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 374 states have (on average 1.1737967914438503) internal successors, (439), 386 states have internal predecessors, (439), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 480 transitions. [2021-05-02 23:02:25,926 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 480 transitions. Word has length 55 [2021-05-02 23:02:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:25,927 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 480 transitions. [2021-05-02 23:02:25,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:02:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 480 transitions. [2021-05-02 23:02:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:25,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:25,928 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:25,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:02:25,928 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 13 times [2021-05-02 23:02:25,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:25,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904009302] [2021-05-02 23:02:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:25,932 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:25,932 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,505 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 23:02:26,505 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904009302] [2021-05-02 23:02:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904009302] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:26,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:26,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094992719] [2021-05-02 23:02:26,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:26,506 INFO L87 Difference]: Start difference. First operand 406 states and 480 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:02:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:27,972 INFO L93 Difference]: Finished difference Result 525 states and 623 transitions. [2021-05-02 23:02:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:02:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 55 [2021-05-02 23:02:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:27,974 INFO L225 Difference]: With dead ends: 525 [2021-05-02 23:02:27,974 INFO L226 Difference]: Without dead ends: 523 [2021-05-02 23:02:27,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1816, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-05-02 23:02:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 403. [2021-05-02 23:02:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 372 states have (on average 1.1774193548387097) internal successors, (438), 383 states have internal predecessors, (438), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 477 transitions. [2021-05-02 23:02:28,077 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 477 transitions. Word has length 55 [2021-05-02 23:02:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:28,077 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 477 transitions. [2021-05-02 23:02:28,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:02:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 477 transitions. [2021-05-02 23:02:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:28,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:28,078 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:28,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:02:28,078 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1524488624, now seen corresponding path program 11 times [2021-05-02 23:02:28,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:28,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790197689] [2021-05-02 23:02:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:28,082 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:28,086 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:28,811 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 23:02:28,811 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:28,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790197689] [2021-05-02 23:02:28,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790197689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:28,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:28,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:02:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209369919] [2021-05-02 23:02:28,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:02:28,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:28,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:02:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:28,812 INFO L87 Difference]: Start difference. First operand 403 states and 477 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 23:02:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:29,851 INFO L93 Difference]: Finished difference Result 456 states and 539 transitions. [2021-05-02 23:02:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:02:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 55 [2021-05-02 23:02:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:29,853 INFO L225 Difference]: With dead ends: 456 [2021-05-02 23:02:29,853 INFO L226 Difference]: Without dead ends: 454 [2021-05-02 23:02:29,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-02 23:02:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 419. [2021-05-02 23:02:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 386 states have (on average 1.1787564766839378) internal successors, (455), 398 states have internal predecessors, (455), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 496 transitions. [2021-05-02 23:02:29,960 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 496 transitions. Word has length 55 [2021-05-02 23:02:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:29,960 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 496 transitions. [2021-05-02 23:02:29,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 23:02:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 496 transitions. [2021-05-02 23:02:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:02:29,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:29,961 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:29,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:02:29,961 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 337785846, now seen corresponding path program 12 times [2021-05-02 23:02:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:29,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061091020] [2021-05-02 23:02:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:29,965 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:29,965 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:30,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:30,477 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 23:02:30,477 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:30,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061091020] [2021-05-02 23:02:30,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061091020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:30,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:30,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284046111] [2021-05-02 23:02:30,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:30,478 INFO L87 Difference]: Start difference. First operand 419 states and 496 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 23:02:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:31,492 INFO L93 Difference]: Finished difference Result 489 states and 579 transitions. [2021-05-02 23:02:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:02:31,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 55 [2021-05-02 23:02:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:31,494 INFO L225 Difference]: With dead ends: 489 [2021-05-02 23:02:31,494 INFO L226 Difference]: Without dead ends: 487 [2021-05-02 23:02:31,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:02:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-05-02 23:02:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 422. [2021-05-02 23:02:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 389 states have (on average 1.179948586118252) internal successors, (459), 401 states have internal predecessors, (459), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 8 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 500 transitions. [2021-05-02 23:02:31,609 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 500 transitions. Word has length 55 [2021-05-02 23:02:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:31,609 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 500 transitions. [2021-05-02 23:02:31,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 23:02:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 500 transitions. [2021-05-02 23:02:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:31,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:31,610 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:31,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:02:31,610 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 3 times [2021-05-02 23:02:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280910018] [2021-05-02 23:02:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:31,614 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:31,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:32,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 23:02:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:32,323 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 23:02:32,323 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:32,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280910018] [2021-05-02 23:02:32,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280910018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:32,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:32,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:02:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831732066] [2021-05-02 23:02:32,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:02:32,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:32,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:02:32,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:32,324 INFO L87 Difference]: Start difference. First operand 422 states and 500 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:34,716 INFO L93 Difference]: Finished difference Result 548 states and 646 transitions. [2021-05-02 23:02:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:02:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-05-02 23:02:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:34,718 INFO L225 Difference]: With dead ends: 548 [2021-05-02 23:02:34,718 INFO L226 Difference]: Without dead ends: 546 [2021-05-02 23:02:34,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 2048.9ms TimeCoverageRelationStatistics Valid=644, Invalid=4758, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:02:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-02 23:02:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 442. [2021-05-02 23:02:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.1829268292682926) internal successors, (485), 422 states have internal predecessors, (485), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 7 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 524 transitions. [2021-05-02 23:02:34,836 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 524 transitions. Word has length 58 [2021-05-02 23:02:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:34,836 INFO L480 AbstractCegarLoop]: Abstraction has 442 states and 524 transitions. [2021-05-02 23:02:34,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 524 transitions. [2021-05-02 23:02:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:34,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:34,837 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 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] [2021-05-02 23:02:34,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:02:34,837 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 4 times [2021-05-02 23:02:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669270649] [2021-05-02 23:02:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:34,841 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:34,841 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:35,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:35,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 23:02:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:35,455 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 23:02:35,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669270649] [2021-05-02 23:02:35,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [669270649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:35,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:35,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:02:35,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646683745] [2021-05-02 23:02:35,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:02:35,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:02:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:02:35,456 INFO L87 Difference]: Start difference. First operand 442 states and 524 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:36,483 INFO L93 Difference]: Finished difference Result 474 states and 561 transitions. [2021-05-02 23:02:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:02:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-05-02 23:02:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:36,485 INFO L225 Difference]: With dead ends: 474 [2021-05-02 23:02:36,485 INFO L226 Difference]: Without dead ends: 472 [2021-05-02 23:02:36,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-02 23:02:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 440. [2021-05-02 23:02:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 408 states have (on average 1.1838235294117647) internal successors, (483), 421 states have internal predecessors, (483), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 522 transitions. [2021-05-02 23:02:36,605 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 522 transitions. Word has length 58 [2021-05-02 23:02:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:36,605 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 522 transitions. [2021-05-02 23:02:36,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 522 transitions. [2021-05-02 23:02:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:02:36,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:36,606 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 23:02:36,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:02:36,607 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:36,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:36,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 5 times [2021-05-02 23:02:36,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:36,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915388997] [2021-05-02 23:02:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:36,611 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:36,611 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 23:02:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:02:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,925 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 23:02:36,925 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:36,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915388997] [2021-05-02 23:02:36,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [915388997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:36,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:36,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:02:36,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801071023] [2021-05-02 23:02:36,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:02:36,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:02:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:02:36,926 INFO L87 Difference]: Start difference. First operand 440 states and 522 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:37,715 INFO L93 Difference]: Finished difference Result 490 states and 581 transitions. [2021-05-02 23:02:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:02:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-05-02 23:02:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:37,718 INFO L225 Difference]: With dead ends: 490 [2021-05-02 23:02:37,718 INFO L226 Difference]: Without dead ends: 488 [2021-05-02 23:02:37,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-02 23:02:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 449. [2021-05-02 23:02:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 416 states have (on average 1.1826923076923077) internal successors, (492), 430 states have internal predecessors, (492), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 533 transitions. [2021-05-02 23:02:37,846 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 533 transitions. Word has length 60 [2021-05-02 23:02:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:37,846 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 533 transitions. [2021-05-02 23:02:37,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 533 transitions. [2021-05-02 23:02:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:37,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:37,847 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:37,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:02:37,847 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -141469330, now seen corresponding path program 14 times [2021-05-02 23:02:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:37,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302461108] [2021-05-02 23:02:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:37,851 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:37,852 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:38,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:38,044 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 23:02:38,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:38,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302461108] [2021-05-02 23:02:38,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302461108] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:38,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:38,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:02:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245439761] [2021-05-02 23:02:38,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:02:38,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:02:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:02:38,045 INFO L87 Difference]: Start difference. First operand 449 states and 533 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 23:02:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:38,792 INFO L93 Difference]: Finished difference Result 942 states and 1152 transitions. [2021-05-02 23:02:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:02:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 58 [2021-05-02 23:02:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:38,795 INFO L225 Difference]: With dead ends: 942 [2021-05-02 23:02:38,795 INFO L226 Difference]: Without dead ends: 820 [2021-05-02 23:02:38,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:02:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-02 23:02:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 642. [2021-05-02 23:02:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 609 states have (on average 1.1986863711001643) internal successors, (730), 623 states have internal predecessors, (730), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 771 transitions. [2021-05-02 23:02:38,972 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 771 transitions. Word has length 58 [2021-05-02 23:02:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:38,973 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 771 transitions. [2021-05-02 23:02:38,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 23:02:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 771 transitions. [2021-05-02 23:02:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:38,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:38,974 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:38,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:02:38,974 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2021-05-02 23:02:38,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:38,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598207511] [2021-05-02 23:02:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:38,978 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:38,978 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:39,270 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 23:02:39,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:39,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598207511] [2021-05-02 23:02:39,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598207511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:39,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:39,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:02:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726166132] [2021-05-02 23:02:39,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:02:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:02:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:39,271 INFO L87 Difference]: Start difference. First operand 642 states and 771 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 23:02:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:41,483 INFO L93 Difference]: Finished difference Result 1025 states and 1247 transitions. [2021-05-02 23:02:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:02:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 58 [2021-05-02 23:02:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:41,487 INFO L225 Difference]: With dead ends: 1025 [2021-05-02 23:02:41,487 INFO L226 Difference]: Without dead ends: 1023 [2021-05-02 23:02:41,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=555, Invalid=5607, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:02:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-05-02 23:02:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 660. [2021-05-02 23:02:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 627 states have (on average 1.2073365231259967) internal successors, (757), 641 states have internal predecessors, (757), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:02:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 798 transitions. [2021-05-02 23:02:41,676 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 798 transitions. Word has length 58 [2021-05-02 23:02:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:41,676 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 798 transitions. [2021-05-02 23:02:41,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 23:02:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 798 transitions. [2021-05-02 23:02:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:41,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:41,678 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:41,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:02:41,678 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 13 times [2021-05-02 23:02:41,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:41,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873064697] [2021-05-02 23:02:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:41,687 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:41,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:42,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:42,260 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 23:02:42,260 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:42,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873064697] [2021-05-02 23:02:42,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [873064697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:42,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503614772] [2021-05-02 23:02:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:42,261 INFO L87 Difference]: Start difference. First operand 660 states and 798 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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 23:02:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:44,817 INFO L93 Difference]: Finished difference Result 796 states and 961 transitions. [2021-05-02 23:02:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:02:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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 58 [2021-05-02 23:02:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:44,820 INFO L225 Difference]: With dead ends: 796 [2021-05-02 23:02:44,820 INFO L226 Difference]: Without dead ends: 794 [2021-05-02 23:02:44,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1668.1ms TimeCoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:02:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-05-02 23:02:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 661. [2021-05-02 23:02:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 629 states have (on average 1.206677265500795) internal successors, (759), 642 states have internal predecessors, (759), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 798 transitions. [2021-05-02 23:02:45,011 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 798 transitions. Word has length 58 [2021-05-02 23:02:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:45,011 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 798 transitions. [2021-05-02 23:02:45,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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 23:02:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 798 transitions. [2021-05-02 23:02:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:45,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:45,013 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:45,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:02:45,013 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 14 times [2021-05-02 23:02:45,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:45,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563477051] [2021-05-02 23:02:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:45,017 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:45,017 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:45,961 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 23:02:45,961 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563477051] [2021-05-02 23:02:45,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [563477051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:45,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:45,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:02:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474840449] [2021-05-02 23:02:45,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:02:45,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:02:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:45,962 INFO L87 Difference]: Start difference. First operand 661 states and 798 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 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 23:02:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:48,558 INFO L93 Difference]: Finished difference Result 868 states and 1051 transitions. [2021-05-02 23:02:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:02:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 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 58 [2021-05-02 23:02:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:48,560 INFO L225 Difference]: With dead ends: 868 [2021-05-02 23:02:48,561 INFO L226 Difference]: Without dead ends: 866 [2021-05-02 23:02:48,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2201.8ms TimeCoverageRelationStatistics Valid=497, Invalid=4333, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:02:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-05-02 23:02:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 680. [2021-05-02 23:02:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 645 states have (on average 1.206201550387597) internal successors, (778), 660 states have internal predecessors, (778), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:02:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 821 transitions. [2021-05-02 23:02:48,762 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 821 transitions. Word has length 58 [2021-05-02 23:02:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 680 states and 821 transitions. [2021-05-02 23:02:48,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 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 23:02:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 821 transitions. [2021-05-02 23:02:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:02:48,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:48,764 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:48,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:02:48,764 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 15 times [2021-05-02 23:02:48,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:48,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657286069] [2021-05-02 23:02:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:48,779 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:48,780 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:49,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:49,313 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 23:02:49,314 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:49,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657286069] [2021-05-02 23:02:49,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657286069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:49,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:49,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831450554] [2021-05-02 23:02:49,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:49,315 INFO L87 Difference]: Start difference. First operand 680 states and 821 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 23:02:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:51,047 INFO L93 Difference]: Finished difference Result 847 states and 1021 transitions. [2021-05-02 23:02:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:02:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 58 [2021-05-02 23:02:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:51,050 INFO L225 Difference]: With dead ends: 847 [2021-05-02 23:02:51,051 INFO L226 Difference]: Without dead ends: 845 [2021-05-02 23:02:51,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 971.5ms TimeCoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-05-02 23:02:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 671. [2021-05-02 23:02:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 636 states have (on average 1.2044025157232705) internal successors, (766), 651 states have internal predecessors, (766), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:02:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 809 transitions. [2021-05-02 23:02:51,255 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 809 transitions. Word has length 58 [2021-05-02 23:02:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:51,255 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 809 transitions. [2021-05-02 23:02:51,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 23:02:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 809 transitions. [2021-05-02 23:02:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:02:51,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:51,257 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:51,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:02:51,257 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1349061435, now seen corresponding path program 6 times [2021-05-02 23:02:51,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:51,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573189353] [2021-05-02 23:02:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:51,260 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:51,262 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:02:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,891 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 23:02:51,892 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:51,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573189353] [2021-05-02 23:02:51,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573189353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:51,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:51,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:51,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634937857] [2021-05-02 23:02:51,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:51,894 INFO L87 Difference]: Start difference. First operand 671 states and 809 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:53,413 INFO L93 Difference]: Finished difference Result 806 states and 969 transitions. [2021-05-02 23:02:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:02:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-05-02 23:02:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:53,416 INFO L225 Difference]: With dead ends: 806 [2021-05-02 23:02:53,416 INFO L226 Difference]: Without dead ends: 804 [2021-05-02 23:02:53,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-05-02 23:02:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 697. [2021-05-02 23:02:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 659 states have (on average 1.2033383915022762) internal successors, (793), 675 states have internal predecessors, (793), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:02:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 840 transitions. [2021-05-02 23:02:53,623 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 840 transitions. Word has length 60 [2021-05-02 23:02:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:53,624 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 840 transitions. [2021-05-02 23:02:53,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 840 transitions. [2021-05-02 23:02:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:02:53,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:53,625 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:53,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:02:53,625 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 527024001, now seen corresponding path program 7 times [2021-05-02 23:02:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:53,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784690320] [2021-05-02 23:02:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:53,630 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:53,631 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:02:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:54,064 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 23:02:54,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784690320] [2021-05-02 23:02:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [784690320] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:54,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:54,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:02:54,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331852921] [2021-05-02 23:02:54,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:02:54,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:02:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:54,065 INFO L87 Difference]: Start difference. First operand 697 states and 840 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:55,498 INFO L93 Difference]: Finished difference Result 826 states and 995 transitions. [2021-05-02 23:02:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-05-02 23:02:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:55,501 INFO L225 Difference]: With dead ends: 826 [2021-05-02 23:02:55,501 INFO L226 Difference]: Without dead ends: 824 [2021-05-02 23:02:55,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 809.7ms TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-05-02 23:02:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 742. [2021-05-02 23:02:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 702 states have (on average 1.2065527065527066) internal successors, (847), 720 states have internal predecessors, (847), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (25), 7 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:02:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 898 transitions. [2021-05-02 23:02:55,731 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 898 transitions. Word has length 60 [2021-05-02 23:02:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:55,731 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 898 transitions. [2021-05-02 23:02:55,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 898 transitions. [2021-05-02 23:02:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:02:55,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:55,733 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:55,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:02:55,733 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 8 times [2021-05-02 23:02:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:55,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839068611] [2021-05-02 23:02:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:55,739 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:55,739 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:02:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,259 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 23:02:56,260 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839068611] [2021-05-02 23:02:56,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839068611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:56,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:56,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:56,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875253609] [2021-05-02 23:02:56,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:56,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:56,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:56,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:56,261 INFO L87 Difference]: Start difference. First operand 742 states and 898 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:58,129 INFO L93 Difference]: Finished difference Result 833 states and 1004 transitions. [2021-05-02 23:02:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:02:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-05-02 23:02:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:58,132 INFO L225 Difference]: With dead ends: 833 [2021-05-02 23:02:58,132 INFO L226 Difference]: Without dead ends: 831 [2021-05-02 23:02:58,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1125.0ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:02:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-05-02 23:02:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 717. [2021-05-02 23:02:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 680 states have (on average 1.2088235294117646) internal successors, (822), 696 states have internal predecessors, (822), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:02:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 869 transitions. [2021-05-02 23:02:58,352 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 869 transitions. Word has length 60 [2021-05-02 23:02:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:58,352 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 869 transitions. [2021-05-02 23:02:58,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 869 transitions. [2021-05-02 23:02:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:02:58,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:58,354 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:58,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:02:58,354 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 5 times [2021-05-02 23:02:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398945794] [2021-05-02 23:02:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:58,359 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:58,359 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 23:02:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:59,132 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 23:02:59,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:59,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398945794] [2021-05-02 23:02:59,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [398945794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:59,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:59,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550208880] [2021-05-02 23:02:59,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:59,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:59,134 INFO L87 Difference]: Start difference. First operand 717 states and 869 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:01,434 INFO L93 Difference]: Finished difference Result 892 states and 1081 transitions. [2021-05-02 23:03:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:03:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2021-05-02 23:03:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:01,437 INFO L225 Difference]: With dead ends: 892 [2021-05-02 23:03:01,437 INFO L226 Difference]: Without dead ends: 890 [2021-05-02 23:03:01,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1604.2ms TimeCoverageRelationStatistics Valid=459, Invalid=3447, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:03:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-05-02 23:03:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 747. [2021-05-02 23:03:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 709 states have (on average 1.2073342736248236) internal successors, (856), 726 states have internal predecessors, (856), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 7 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:03:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 905 transitions. [2021-05-02 23:03:01,676 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 905 transitions. Word has length 61 [2021-05-02 23:03:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:01,677 INFO L480 AbstractCegarLoop]: Abstraction has 747 states and 905 transitions. [2021-05-02 23:03:01,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 905 transitions. [2021-05-02 23:03:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:03:01,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:01,678 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 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] [2021-05-02 23:03:01,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:03:01,678 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 6 times [2021-05-02 23:03:01,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:01,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020960393] [2021-05-02 23:03:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:01,682 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:01,682 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:02,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:02,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 23:03:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:02,428 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 23:03:02,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020960393] [2021-05-02 23:03:02,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020960393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:02,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:02,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:03:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917046292] [2021-05-02 23:03:02,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:03:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:03:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:03:02,429 INFO L87 Difference]: Start difference. First operand 747 states and 905 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:05,308 INFO L93 Difference]: Finished difference Result 895 states and 1081 transitions. [2021-05-02 23:03:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:03:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2021-05-02 23:03:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:05,311 INFO L225 Difference]: With dead ends: 895 [2021-05-02 23:03:05,311 INFO L226 Difference]: Without dead ends: 893 [2021-05-02 23:03:05,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2081.3ms TimeCoverageRelationStatistics Valid=624, Invalid=3666, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:03:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-05-02 23:03:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 762. [2021-05-02 23:03:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 724 states have (on average 1.207182320441989) internal successors, (874), 741 states have internal predecessors, (874), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 7 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:03:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 923 transitions. [2021-05-02 23:03:05,556 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 923 transitions. Word has length 61 [2021-05-02 23:03:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:05,556 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 923 transitions. [2021-05-02 23:03:05,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 923 transitions. [2021-05-02 23:03:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:03:05,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:05,557 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:05,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:03:05,558 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1930573552, now seen corresponding path program 16 times [2021-05-02 23:03:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:05,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380809331] [2021-05-02 23:03:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:05,571 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:05,572 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,455 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 23:03:06,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380809331] [2021-05-02 23:03:06,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [380809331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:06,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:06,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:03:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108798389] [2021-05-02 23:03:06,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:03:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:03:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:03:06,456 INFO L87 Difference]: Start difference. First operand 762 states and 923 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 23:03:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:10,632 INFO L93 Difference]: Finished difference Result 1175 states and 1434 transitions. [2021-05-02 23:03:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:03:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 60 [2021-05-02 23:03:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:10,635 INFO L225 Difference]: With dead ends: 1175 [2021-05-02 23:03:10,636 INFO L226 Difference]: Without dead ends: 1173 [2021-05-02 23:03:10,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2882.2ms TimeCoverageRelationStatistics Valid=756, Invalid=3936, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:03:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-05-02 23:03:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 807. [2021-05-02 23:03:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 765 states have (on average 1.2078431372549019) internal successors, (924), 784 states have internal predecessors, (924), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (26), 7 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 23:03:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 977 transitions. [2021-05-02 23:03:10,900 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 977 transitions. Word has length 60 [2021-05-02 23:03:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:10,900 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 977 transitions. [2021-05-02 23:03:10,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 23:03:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 977 transitions. [2021-05-02 23:03:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:10,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:10,902 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 23:03:10,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:03:10,902 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 9 times [2021-05-02 23:03:10,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:10,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428354529] [2021-05-02 23:03:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:10,906 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:10,906 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 23:03:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 23:03:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,478 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 23:03:11,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:11,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428354529] [2021-05-02 23:03:11,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [428354529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:11,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:11,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:03:11,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276153733] [2021-05-02 23:03:11,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:03:11,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:03:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:03:11,479 INFO L87 Difference]: Start difference. First operand 807 states and 977 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:12,922 INFO L93 Difference]: Finished difference Result 914 states and 1107 transitions. [2021-05-02 23:03:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:03:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2021-05-02 23:03:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:12,926 INFO L225 Difference]: With dead ends: 914 [2021-05-02 23:03:12,926 INFO L226 Difference]: Without dead ends: 912 [2021-05-02 23:03:12,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:03:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-05-02 23:03:13,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 849. [2021-05-02 23:03:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 804 states have (on average 1.2077114427860696) internal successors, (971), 824 states have internal predecessors, (971), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (29), 9 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:03:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1030 transitions. [2021-05-02 23:03:13,209 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1030 transitions. Word has length 63 [2021-05-02 23:03:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:13,209 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 1030 transitions. [2021-05-02 23:03:13,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1030 transitions. [2021-05-02 23:03:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:03:13,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:13,210 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:13,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:03:13,210 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1961217892, now seen corresponding path program 17 times [2021-05-02 23:03:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:13,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163704725] [2021-05-02 23:03:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:13,219 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:13,220 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:13,309 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 23:03:13,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163704725] [2021-05-02 23:03:13,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [163704725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:13,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:13,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:03:13,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569913230] [2021-05-02 23:03:13,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:03:13,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:03:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:03:13,310 INFO L87 Difference]: Start difference. First operand 849 states and 1030 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 23:03:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:14,201 INFO L93 Difference]: Finished difference Result 1070 states and 1305 transitions. [2021-05-02 23:03:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:03:14,202 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 61 [2021-05-02 23:03:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:14,204 INFO L225 Difference]: With dead ends: 1070 [2021-05-02 23:03:14,204 INFO L226 Difference]: Without dead ends: 1037 [2021-05-02 23:03:14,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:03:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-05-02 23:03:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 850. [2021-05-02 23:03:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 805 states have (on average 1.204968944099379) internal successors, (970), 825 states have internal predecessors, (970), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (29), 9 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:03:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1029 transitions. [2021-05-02 23:03:14,488 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1029 transitions. Word has length 61 [2021-05-02 23:03:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:14,488 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1029 transitions. [2021-05-02 23:03:14,488 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 23:03:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1029 transitions. [2021-05-02 23:03:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:03:14,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:14,489 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:14,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:03:14,489 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 16 times [2021-05-02 23:03:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:14,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799995662] [2021-05-02 23:03:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:14,493 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:14,494 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:14,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:14,871 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 23:03:14,871 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:14,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799995662] [2021-05-02 23:03:14,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [799995662] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:14,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:14,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:03:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068256936] [2021-05-02 23:03:14,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:03:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:03:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:03:14,872 INFO L87 Difference]: Start difference. First operand 850 states and 1029 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23:03:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:18,115 INFO L93 Difference]: Finished difference Result 1231 states and 1496 transitions. [2021-05-02 23:03:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:03:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 61 [2021-05-02 23:03:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:18,119 INFO L225 Difference]: With dead ends: 1231 [2021-05-02 23:03:18,119 INFO L226 Difference]: Without dead ends: 1229 [2021-05-02 23:03:18,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1309.8ms TimeCoverageRelationStatistics Valid=490, Invalid=5362, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:03:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-05-02 23:03:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 897. [2021-05-02 23:03:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 849 states have (on average 1.2061248527679622) internal successors, (1024), 871 states have internal predecessors, (1024), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (31), 9 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:03:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1087 transitions. [2021-05-02 23:03:18,433 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1087 transitions. Word has length 61 [2021-05-02 23:03:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:18,434 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1087 transitions. [2021-05-02 23:03:18,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 23:03:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1087 transitions. [2021-05-02 23:03:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:03:18,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:18,436 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 23:03:18,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:03:18,436 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 5 times [2021-05-02 23:03:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:18,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926976837] [2021-05-02 23:03:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:18,440 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:18,448 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:18,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:03:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:18,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:03:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:18,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:03:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:18,617 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 23:03:18,618 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926976837] [2021-05-02 23:03:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926976837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:18,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:18,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:03:18,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972451833] [2021-05-02 23:03:18,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:03:18,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:03:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:03:18,618 INFO L87 Difference]: Start difference. First operand 897 states and 1087 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:03:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:19,355 INFO L93 Difference]: Finished difference Result 954 states and 1153 transitions. [2021-05-02 23:03:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:03:19,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2021-05-02 23:03:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:19,357 INFO L225 Difference]: With dead ends: 954 [2021-05-02 23:03:19,357 INFO L226 Difference]: Without dead ends: 871 [2021-05-02 23:03:19,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:03:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-05-02 23:03:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 821. [2021-05-02 23:03:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 783 states have (on average 1.1826309067688379) internal successors, (926), 797 states have internal predecessors, (926), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:03:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 976 transitions. [2021-05-02 23:03:19,643 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 976 transitions. Word has length 65 [2021-05-02 23:03:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:19,643 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 976 transitions. [2021-05-02 23:03:19,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:03:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 976 transitions. [2021-05-02 23:03:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:19,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:19,644 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:19,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:03:19,644 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 10 times [2021-05-02 23:03:19,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:19,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347111600] [2021-05-02 23:03:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:19,650 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:19,651 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:20,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:20,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 23:03:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:20,031 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 23:03:20,031 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:20,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347111600] [2021-05-02 23:03:20,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [347111600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:20,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:20,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:03:20,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548480974] [2021-05-02 23:03:20,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:03:20,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:03:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:03:20,032 INFO L87 Difference]: Start difference. First operand 821 states and 976 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:22,024 INFO L93 Difference]: Finished difference Result 1127 states and 1350 transitions. [2021-05-02 23:03:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:03:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-05-02 23:03:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:22,028 INFO L225 Difference]: With dead ends: 1127 [2021-05-02 23:03:22,028 INFO L226 Difference]: Without dead ends: 1125 [2021-05-02 23:03:22,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 940.9ms TimeCoverageRelationStatistics Valid=313, Invalid=3227, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:03:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-05-02 23:03:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 889. [2021-05-02 23:03:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 844 states have (on average 1.1812796208530805) internal successors, (997), 863 states have internal predecessors, (997), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 12 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:03:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1059 transitions. [2021-05-02 23:03:22,357 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1059 transitions. Word has length 63 [2021-05-02 23:03:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:22,357 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 1059 transitions. [2021-05-02 23:03:22,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1059 transitions. [2021-05-02 23:03:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:22,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:22,359 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:22,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:03:22,359 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:22,359 INFO L82 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 11 times [2021-05-02 23:03:22,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:22,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184585599] [2021-05-02 23:03:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:22,375 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:22,375 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:22,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:22,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 23:03:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:22,855 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 23:03:22,855 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:22,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184585599] [2021-05-02 23:03:22,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [184585599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:22,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:22,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:03:22,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730683480] [2021-05-02 23:03:22,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:03:22,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:03:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:03:22,856 INFO L87 Difference]: Start difference. First operand 889 states and 1059 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:25,778 INFO L93 Difference]: Finished difference Result 1052 states and 1254 transitions. [2021-05-02 23:03:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:03:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-05-02 23:03:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:25,781 INFO L225 Difference]: With dead ends: 1052 [2021-05-02 23:03:25,781 INFO L226 Difference]: Without dead ends: 1050 [2021-05-02 23:03:25,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1672.7ms TimeCoverageRelationStatistics Valid=390, Invalid=3642, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:03:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-05-02 23:03:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 910. [2021-05-02 23:03:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 861 states have (on average 1.1800232288037167) internal successors, (1016), 881 states have internal predecessors, (1016), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 13 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:03:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1082 transitions. [2021-05-02 23:03:26,126 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1082 transitions. Word has length 63 [2021-05-02 23:03:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:26,126 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 1082 transitions. [2021-05-02 23:03:26,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1082 transitions. [2021-05-02 23:03:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:26,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:26,128 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:26,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:03:26,128 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:26,128 INFO L82 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 12 times [2021-05-02 23:03:26,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:26,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500074345] [2021-05-02 23:03:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:26,132 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:26,133 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:26,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 23:03:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:26,671 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 23:03:26,671 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500074345] [2021-05-02 23:03:26,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500074345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:26,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:26,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:03:26,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920834873] [2021-05-02 23:03:26,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:03:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:03:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:03:26,672 INFO L87 Difference]: Start difference. First operand 910 states and 1082 transitions. Second operand has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:28,597 INFO L93 Difference]: Finished difference Result 978 states and 1161 transitions. [2021-05-02 23:03:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:03:28,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-05-02 23:03:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:28,600 INFO L225 Difference]: With dead ends: 978 [2021-05-02 23:03:28,600 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 23:03:28,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1013.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:03:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 23:03:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 904. [2021-05-02 23:03:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 855 states have (on average 1.1801169590643275) internal successors, (1009), 875 states have internal predecessors, (1009), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 13 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:03:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1075 transitions. [2021-05-02 23:03:28,945 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1075 transitions. Word has length 63 [2021-05-02 23:03:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 1075 transitions. [2021-05-02 23:03:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1075 transitions. [2021-05-02 23:03:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:03:28,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:28,946 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 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] [2021-05-02 23:03:28,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:03:28,946 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:28,947 INFO L82 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 7 times [2021-05-02 23:03:28,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:28,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303529565] [2021-05-02 23:03:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:28,951 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:28,951 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 23:03:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:29,990 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 23:03:29,990 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:29,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303529565] [2021-05-02 23:03:29,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303529565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:29,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:29,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:03:29,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467111314] [2021-05-02 23:03:29,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:03:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:03:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:03:29,991 INFO L87 Difference]: Start difference. First operand 904 states and 1075 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:32,712 INFO L93 Difference]: Finished difference Result 962 states and 1143 transitions. [2021-05-02 23:03:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:03:32,713 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2021-05-02 23:03:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:32,715 INFO L225 Difference]: With dead ends: 962 [2021-05-02 23:03:32,715 INFO L226 Difference]: Without dead ends: 960 [2021-05-02 23:03:32,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2119.9ms TimeCoverageRelationStatistics Valid=414, Invalid=3492, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:03:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-05-02 23:03:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 930. [2021-05-02 23:03:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 878 states have (on average 1.1799544419134396) internal successors, (1036), 899 states have internal predecessors, (1036), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 14 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:03:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1106 transitions. [2021-05-02 23:03:33,119 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1106 transitions. Word has length 64 [2021-05-02 23:03:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:33,119 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 1106 transitions. [2021-05-02 23:03:33,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1106 transitions. [2021-05-02 23:03:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:03:33,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:33,120 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:33,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:03:33,120 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 6 times [2021-05-02 23:03:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:33,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231357967] [2021-05-02 23:03:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:33,126 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:33,126 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:33,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:33,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:03:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:33,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:03:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:33,673 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 23:03:33,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231357967] [2021-05-02 23:03:33,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231357967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:33,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:33,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:03:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673459598] [2021-05-02 23:03:33,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:03:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:03:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:03:33,674 INFO L87 Difference]: Start difference. First operand 930 states and 1106 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:35,098 INFO L93 Difference]: Finished difference Result 984 states and 1171 transitions. [2021-05-02 23:03:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:03:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2021-05-02 23:03:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:35,110 INFO L225 Difference]: With dead ends: 984 [2021-05-02 23:03:35,110 INFO L226 Difference]: Without dead ends: 982 [2021-05-02 23:03:35,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 833.9ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:03:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-05-02 23:03:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 976. [2021-05-02 23:03:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 915 states have (on average 1.1759562841530056) internal successors, (1076), 940 states have internal predecessors, (1076), 44 states have call successors, (44), 17 states have call predecessors, (44), 16 states have return successors, (42), 18 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 23:03:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1162 transitions. [2021-05-02 23:03:35,553 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1162 transitions. Word has length 65 [2021-05-02 23:03:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:35,553 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 1162 transitions. [2021-05-02 23:03:35,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1162 transitions. [2021-05-02 23:03:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:35,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:35,555 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:35,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:03:35,555 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 18 times [2021-05-02 23:03:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:35,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16560120] [2021-05-02 23:03:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:35,560 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:35,561 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:36,687 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 23:03:36,687 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16560120] [2021-05-02 23:03:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [16560120] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:36,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:36,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:03:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875263918] [2021-05-02 23:03:36,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:03:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:03:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:03:36,688 INFO L87 Difference]: Start difference. First operand 976 states and 1162 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 23:03:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:39,234 INFO L93 Difference]: Finished difference Result 1337 states and 1609 transitions. [2021-05-02 23:03:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:03:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 63 [2021-05-02 23:03:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:39,237 INFO L225 Difference]: With dead ends: 1337 [2021-05-02 23:03:39,237 INFO L226 Difference]: Without dead ends: 1335 [2021-05-02 23:03:39,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=303, Invalid=2453, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:03:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-05-02 23:03:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1039. [2021-05-02 23:03:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 974 states have (on average 1.1806981519507187) internal successors, (1150), 1001 states have internal predecessors, (1150), 46 states have call successors, (46), 19 states have call predecessors, (46), 18 states have return successors, (44), 18 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 23:03:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1240 transitions. [2021-05-02 23:03:39,658 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1240 transitions. Word has length 63 [2021-05-02 23:03:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:39,658 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 1240 transitions. [2021-05-02 23:03:39,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 23:03:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1240 transitions. [2021-05-02 23:03:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:39,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:39,660 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:39,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:03:39,660 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash 78615171, now seen corresponding path program 19 times [2021-05-02 23:03:39,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:39,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729232476] [2021-05-02 23:03:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:39,666 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:39,667 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:40,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:40,482 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 23:03:40,483 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729232476] [2021-05-02 23:03:40,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729232476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:40,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:40,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:03:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944616253] [2021-05-02 23:03:40,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:03:40,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:03:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:03:40,483 INFO L87 Difference]: Start difference. First operand 1039 states and 1240 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 23:03:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:43,727 INFO L93 Difference]: Finished difference Result 1319 states and 1584 transitions. [2021-05-02 23:03:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:03:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 63 [2021-05-02 23:03:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:43,730 INFO L225 Difference]: With dead ends: 1319 [2021-05-02 23:03:43,730 INFO L226 Difference]: Without dead ends: 1317 [2021-05-02 23:03:43,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1786.1ms TimeCoverageRelationStatistics Valid=439, Invalid=3343, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:03:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-05-02 23:03:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1067. [2021-05-02 23:03:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1001 states have (on average 1.1818181818181819) internal successors, (1183), 1028 states have internal predecessors, (1183), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (44), 18 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 23:03:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1273 transitions. [2021-05-02 23:03:44,164 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1273 transitions. Word has length 63 [2021-05-02 23:03:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:44,164 INFO L480 AbstractCegarLoop]: Abstraction has 1067 states and 1273 transitions. [2021-05-02 23:03:44,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 23:03:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1273 transitions. [2021-05-02 23:03:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:03:44,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:44,166 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:44,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:03:44,166 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1108087607, now seen corresponding path program 20 times [2021-05-02 23:03:44,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:44,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664564810] [2021-05-02 23:03:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:44,170 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:44,170 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:45,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:45,150 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 23:03:45,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:45,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664564810] [2021-05-02 23:03:45,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [664564810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:45,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:45,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:03:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055734524] [2021-05-02 23:03:45,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:03:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:03:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:03:45,151 INFO L87 Difference]: Start difference. First operand 1067 states and 1273 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 23:03:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:47,778 INFO L93 Difference]: Finished difference Result 1167 states and 1390 transitions. [2021-05-02 23:03:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:03:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 63 [2021-05-02 23:03:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:47,780 INFO L225 Difference]: With dead ends: 1167 [2021-05-02 23:03:47,780 INFO L226 Difference]: Without dead ends: 1165 [2021-05-02 23:03:47,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1815.4ms TimeCoverageRelationStatistics Valid=490, Invalid=3050, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:03:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-05-02 23:03:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2021-05-02 23:03:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1002 states have (on average 1.183632734530938) internal successors, (1186), 1028 states have internal predecessors, (1186), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 18 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 23:03:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1274 transitions. [2021-05-02 23:03:48,229 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1274 transitions. Word has length 63 [2021-05-02 23:03:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:48,229 INFO L480 AbstractCegarLoop]: Abstraction has 1067 states and 1274 transitions. [2021-05-02 23:03:48,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 23:03:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1274 transitions. [2021-05-02 23:03:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:03:48,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:48,231 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 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] [2021-05-02 23:03:48,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:03:48,231 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 8 times [2021-05-02 23:03:48,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:48,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588310087] [2021-05-02 23:03:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:48,235 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:48,236 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 23:03:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:03:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:48,806 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 23:03:48,806 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588310087] [2021-05-02 23:03:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [588310087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:48,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:48,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:03:48,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506604330] [2021-05-02 23:03:48,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:03:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:03:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:03:48,807 INFO L87 Difference]: Start difference. First operand 1067 states and 1274 transitions. Second operand has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:51,205 INFO L93 Difference]: Finished difference Result 1172 states and 1396 transitions. [2021-05-02 23:03:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:03:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2021-05-02 23:03:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:51,208 INFO L225 Difference]: With dead ends: 1172 [2021-05-02 23:03:51,208 INFO L226 Difference]: Without dead ends: 1116 [2021-05-02 23:03:51,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1463.2ms TimeCoverageRelationStatistics Valid=409, Invalid=2561, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:03:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-05-02 23:03:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1017. [2021-05-02 23:03:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 956 states have (on average 1.1882845188284519) internal successors, (1136), 982 states have internal predecessors, (1136), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:03:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1218 transitions. [2021-05-02 23:03:51,632 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1218 transitions. Word has length 66 [2021-05-02 23:03:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:51,632 INFO L480 AbstractCegarLoop]: Abstraction has 1017 states and 1218 transitions. [2021-05-02 23:03:51,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1218 transitions. [2021-05-02 23:03:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:03:51,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:51,634 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:51,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:03:51,634 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 13 times [2021-05-02 23:03:51,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:51,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869805730] [2021-05-02 23:03:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:51,638 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:51,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 23:03:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:03:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:52,343 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 23:03:52,343 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:52,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869805730] [2021-05-02 23:03:52,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869805730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:52,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:52,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:03:52,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893082045] [2021-05-02 23:03:52,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:03:52,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:03:52,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:03:52,344 INFO L87 Difference]: Start difference. First operand 1017 states and 1218 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:55,293 INFO L93 Difference]: Finished difference Result 1086 states and 1299 transitions. [2021-05-02 23:03:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:03:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2021-05-02 23:03:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:55,296 INFO L225 Difference]: With dead ends: 1086 [2021-05-02 23:03:55,296 INFO L226 Difference]: Without dead ends: 1041 [2021-05-02 23:03:55,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2022.6ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:03:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-05-02 23:03:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 992. [2021-05-02 23:03:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 933 states have (on average 1.1886387995712755) internal successors, (1109), 958 states have internal predecessors, (1109), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (38), 14 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:03:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1187 transitions. [2021-05-02 23:03:55,705 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1187 transitions. Word has length 66 [2021-05-02 23:03:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:55,705 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1187 transitions. [2021-05-02 23:03:55,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:03:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1187 transitions. [2021-05-02 23:03:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:03:55,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:55,707 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:55,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:03:55,707 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 14 times [2021-05-02 23:03:55,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:55,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70432781] [2021-05-02 23:03:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:55,711 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:55,712 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:03:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:56,151 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 23:03:56,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:56,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70432781] [2021-05-02 23:03:56,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [70432781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:56,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:56,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:03:56,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512655443] [2021-05-02 23:03:56,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:03:56,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:56,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:03:56,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:03:56,152 INFO L87 Difference]: Start difference. First operand 992 states and 1187 transitions. Second operand has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:58,472 INFO L93 Difference]: Finished difference Result 1214 states and 1461 transitions. [2021-05-02 23:03:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:03:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2021-05-02 23:03:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:58,475 INFO L225 Difference]: With dead ends: 1214 [2021-05-02 23:03:58,475 INFO L226 Difference]: Without dead ends: 1212 [2021-05-02 23:03:58,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1280.2ms TimeCoverageRelationStatistics Valid=705, Invalid=3077, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:03:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-05-02 23:03:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 999. [2021-05-02 23:03:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 940 states have (on average 1.1882978723404256) internal successors, (1117), 965 states have internal predecessors, (1117), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (38), 14 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:03:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1195 transitions. [2021-05-02 23:03:58,891 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1195 transitions. Word has length 66 [2021-05-02 23:03:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:58,891 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 1195 transitions. [2021-05-02 23:03:58,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:03:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1195 transitions. [2021-05-02 23:03:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:03:58,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:58,893 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:58,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:03:58,893 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -907802659, now seen corresponding path program 9 times [2021-05-02 23:03:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:58,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571739490] [2021-05-02 23:03:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:58,897 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:58,898 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:58,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:58,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:03:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:58,992 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 23:03:58,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:58,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571739490] [2021-05-02 23:03:58,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571739490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:58,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:58,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:03:58,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548152386] [2021-05-02 23:03:58,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:03:58,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:03:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:03:58,993 INFO L87 Difference]: Start difference. First operand 999 states and 1195 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:00,025 INFO L93 Difference]: Finished difference Result 1185 states and 1424 transitions. [2021-05-02 23:04:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:04:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2021-05-02 23:04:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:00,027 INFO L225 Difference]: With dead ends: 1185 [2021-05-02 23:04:00,028 INFO L226 Difference]: Without dead ends: 1144 [2021-05-02 23:04:00,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=265, Invalid=727, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:04:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-05-02 23:04:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1000. [2021-05-02 23:04:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 941 states have (on average 1.1870350690754516) internal successors, (1117), 966 states have internal predecessors, (1117), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (38), 14 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:04:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1195 transitions. [2021-05-02 23:04:00,446 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1195 transitions. Word has length 66 [2021-05-02 23:04:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:00,447 INFO L480 AbstractCegarLoop]: Abstraction has 1000 states and 1195 transitions. [2021-05-02 23:04:00,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1195 transitions. [2021-05-02 23:04:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:00,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:00,448 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:00,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:04:00,448 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 958384667, now seen corresponding path program 15 times [2021-05-02 23:04:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:00,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332456016] [2021-05-02 23:04:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:00,452 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:00,453 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:04:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:01,022 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 23:04:01,022 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332456016] [2021-05-02 23:04:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332456016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:01,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:01,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:04:01,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105335172] [2021-05-02 23:04:01,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:04:01,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:04:01,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:04:01,023 INFO L87 Difference]: Start difference. First operand 1000 states and 1195 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:03,799 INFO L93 Difference]: Finished difference Result 1127 states and 1345 transitions. [2021-05-02 23:04:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:04:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2021-05-02 23:04:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:03,802 INFO L225 Difference]: With dead ends: 1127 [2021-05-02 23:04:03,802 INFO L226 Difference]: Without dead ends: 1125 [2021-05-02 23:04:03,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1499.7ms TimeCoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:04:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-05-02 23:04:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 994. [2021-05-02 23:04:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 935 states have (on average 1.1871657754010696) internal successors, (1110), 960 states have internal predecessors, (1110), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (38), 14 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:04:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1188 transitions. [2021-05-02 23:04:04,228 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1188 transitions. Word has length 66 [2021-05-02 23:04:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:04,229 INFO L480 AbstractCegarLoop]: Abstraction has 994 states and 1188 transitions. [2021-05-02 23:04:04,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1188 transitions. [2021-05-02 23:04:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:04,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:04,230 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:04,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:04:04,230 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:04,230 INFO L82 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 10 times [2021-05-02 23:04:04,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:04,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37617580] [2021-05-02 23:04:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:04,238 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:04,239 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:05,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:05,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:04:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:05,387 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 23:04:05,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:05,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37617580] [2021-05-02 23:04:05,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [37617580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:05,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:05,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:04:05,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537907735] [2021-05-02 23:04:05,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:04:05,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:04:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:04:05,388 INFO L87 Difference]: Start difference. First operand 994 states and 1188 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:09,537 INFO L93 Difference]: Finished difference Result 1204 states and 1441 transitions. [2021-05-02 23:04:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:04:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2021-05-02 23:04:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:09,540 INFO L225 Difference]: With dead ends: 1204 [2021-05-02 23:04:09,540 INFO L226 Difference]: Without dead ends: 1202 [2021-05-02 23:04:09,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 3015.3ms TimeCoverageRelationStatistics Valid=551, Invalid=5455, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:04:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-05-02 23:04:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 981. [2021-05-02 23:04:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 922 states have (on average 1.185466377440347) internal successors, (1093), 946 states have internal predecessors, (1093), 40 states have call successors, (40), 19 states have call predecessors, (40), 18 states have return successors, (38), 15 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:04:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1171 transitions. [2021-05-02 23:04:09,964 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1171 transitions. Word has length 66 [2021-05-02 23:04:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:09,964 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 1171 transitions. [2021-05-02 23:04:09,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:04:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1171 transitions. [2021-05-02 23:04:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:04:09,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:09,965 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:09,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:04:09,965 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 16 times [2021-05-02 23:04:09,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:09,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859156371] [2021-05-02 23:04:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:09,976 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:09,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:10,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:10,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:04:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:10,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:04:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:10,373 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 23:04:10,374 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:10,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859156371] [2021-05-02 23:04:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [859156371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:10,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:04:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807617354] [2021-05-02 23:04:10,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:04:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:04:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:04:10,374 INFO L87 Difference]: Start difference. First operand 981 states and 1171 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:04:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:12,357 INFO L93 Difference]: Finished difference Result 1215 states and 1459 transitions. [2021-05-02 23:04:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:04:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-05-02 23:04:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:12,360 INFO L225 Difference]: With dead ends: 1215 [2021-05-02 23:04:12,360 INFO L226 Difference]: Without dead ends: 1213 [2021-05-02 23:04:12,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:04:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-05-02 23:04:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1061. [2021-05-02 23:04:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 988 states have (on average 1.1791497975708503) internal successors, (1165), 1020 states have internal predecessors, (1165), 53 states have call successors, (53), 20 states have call predecessors, (53), 19 states have return successors, (51), 20 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 23:04:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1269 transitions. [2021-05-02 23:04:12,869 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1269 transitions. Word has length 68 [2021-05-02 23:04:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:12,869 INFO L480 AbstractCegarLoop]: Abstraction has 1061 states and 1269 transitions. [2021-05-02 23:04:12,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:04:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1269 transitions. [2021-05-02 23:04:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:04:12,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:12,870 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:12,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:04:12,871 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 17 times [2021-05-02 23:04:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:12,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421352765] [2021-05-02 23:04:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:12,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:12,877 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 23:04:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:04:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:13,444 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 23:04:13,444 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:13,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421352765] [2021-05-02 23:04:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [421352765] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:13,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:13,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:04:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603296752] [2021-05-02 23:04:13,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:04:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:04:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:04:13,445 INFO L87 Difference]: Start difference. First operand 1061 states and 1269 transitions. Second operand has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:04:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:15,106 INFO L93 Difference]: Finished difference Result 1131 states and 1349 transitions. [2021-05-02 23:04:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:04:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-05-02 23:04:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:15,109 INFO L225 Difference]: With dead ends: 1131 [2021-05-02 23:04:15,109 INFO L226 Difference]: Without dead ends: 1129 [2021-05-02 23:04:15,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:04:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-05-02 23:04:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1061. [2021-05-02 23:04:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 988 states have (on average 1.1791497975708503) internal successors, (1165), 1020 states have internal predecessors, (1165), 53 states have call successors, (53), 20 states have call predecessors, (53), 19 states have return successors, (51), 20 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 23:04:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1269 transitions. [2021-05-02 23:04:15,621 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1269 transitions. Word has length 68 [2021-05-02 23:04:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:15,621 INFO L480 AbstractCegarLoop]: Abstraction has 1061 states and 1269 transitions. [2021-05-02 23:04:15,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:04:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1269 transitions. [2021-05-02 23:04:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:15,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:15,623 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:15,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:04:15,623 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 21 times [2021-05-02 23:04:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:15,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738232801] [2021-05-02 23:04:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:15,627 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:15,628 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:16,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:16,983 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 23:04:16,984 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738232801] [2021-05-02 23:04:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [738232801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:04:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172472142] [2021-05-02 23:04:16,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:04:16,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:16,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:04:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:04:16,985 INFO L87 Difference]: Start difference. First operand 1061 states and 1269 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 23:04:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:20,747 INFO L93 Difference]: Finished difference Result 1484 states and 1787 transitions. [2021-05-02 23:04:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:04:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 66 [2021-05-02 23:04:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:20,750 INFO L225 Difference]: With dead ends: 1484 [2021-05-02 23:04:20,750 INFO L226 Difference]: Without dead ends: 1482 [2021-05-02 23:04:20,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2309.3ms TimeCoverageRelationStatistics Valid=351, Invalid=3189, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:04:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-05-02 23:04:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1082. [2021-05-02 23:04:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1005 states have (on average 1.1771144278606964) internal successors, (1183), 1039 states have internal predecessors, (1183), 55 states have call successors, (55), 22 states have call predecessors, (55), 21 states have return successors, (53), 20 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 23:04:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1291 transitions. [2021-05-02 23:04:21,275 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1291 transitions. Word has length 66 [2021-05-02 23:04:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 1082 states and 1291 transitions. [2021-05-02 23:04:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 23:04:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1291 transitions. [2021-05-02 23:04:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:21,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:21,277 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:21,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:04:21,277 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 22 times [2021-05-02 23:04:21,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:21,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064258550] [2021-05-02 23:04:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:21,282 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:21,282 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:22,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:22,015 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 23:04:22,015 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:22,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064258550] [2021-05-02 23:04:22,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064258550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:22,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:22,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:04:22,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190138648] [2021-05-02 23:04:22,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:04:22,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:22,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:04:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:04:22,016 INFO L87 Difference]: Start difference. First operand 1082 states and 1291 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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 23:04:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:25,847 INFO L93 Difference]: Finished difference Result 1345 states and 1614 transitions. [2021-05-02 23:04:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:04:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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 66 [2021-05-02 23:04:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:25,851 INFO L225 Difference]: With dead ends: 1345 [2021-05-02 23:04:25,851 INFO L226 Difference]: Without dead ends: 1343 [2021-05-02 23:04:25,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1960.3ms TimeCoverageRelationStatistics Valid=572, Invalid=3718, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:04:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-02 23:04:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1094. [2021-05-02 23:04:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1015 states have (on average 1.1773399014778325) internal successors, (1195), 1050 states have internal predecessors, (1195), 56 states have call successors, (56), 23 states have call predecessors, (56), 22 states have return successors, (54), 20 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 23:04:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1305 transitions. [2021-05-02 23:04:26,404 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1305 transitions. Word has length 66 [2021-05-02 23:04:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:26,404 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1305 transitions. [2021-05-02 23:04:26,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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 23:04:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1305 transitions. [2021-05-02 23:04:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:26,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:26,406 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:26,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:04:26,406 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 23 times [2021-05-02 23:04:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:26,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84440624] [2021-05-02 23:04:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:26,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:26,411 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:27,274 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 23:04:27,274 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:27,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84440624] [2021-05-02 23:04:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [84440624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:27,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:27,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:04:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421076459] [2021-05-02 23:04:27,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:04:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:27,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:04:27,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:04:27,275 INFO L87 Difference]: Start difference. First operand 1094 states and 1305 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 23:04:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:30,986 INFO L93 Difference]: Finished difference Result 1363 states and 1636 transitions. [2021-05-02 23:04:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:04:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 66 [2021-05-02 23:04:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:30,990 INFO L225 Difference]: With dead ends: 1363 [2021-05-02 23:04:30,990 INFO L226 Difference]: Without dead ends: 1361 [2021-05-02 23:04:30,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2103.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2982, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:04:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-05-02 23:04:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1113. [2021-05-02 23:04:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1032 states have (on average 1.177325581395349) internal successors, (1215), 1068 states have internal predecessors, (1215), 57 states have call successors, (57), 24 states have call predecessors, (57), 23 states have return successors, (55), 20 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 23:04:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1327 transitions. [2021-05-02 23:04:31,525 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1327 transitions. Word has length 66 [2021-05-02 23:04:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:31,525 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 1327 transitions. [2021-05-02 23:04:31,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 23:04:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1327 transitions. [2021-05-02 23:04:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:31,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:31,527 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:31,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:04:31,527 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 24 times [2021-05-02 23:04:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:31,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458939570] [2021-05-02 23:04:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:31,532 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:31,532 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:32,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:32,563 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 23:04:32,563 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:32,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458939570] [2021-05-02 23:04:32,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458939570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:32,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:32,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:04:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025833193] [2021-05-02 23:04:32,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:04:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:04:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:04:32,564 INFO L87 Difference]: Start difference. First operand 1113 states and 1327 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 23:04:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:37,475 INFO L93 Difference]: Finished difference Result 1461 states and 1755 transitions. [2021-05-02 23:04:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:04:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 66 [2021-05-02 23:04:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:37,479 INFO L225 Difference]: With dead ends: 1461 [2021-05-02 23:04:37,480 INFO L226 Difference]: Without dead ends: 1459 [2021-05-02 23:04:37,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2204.3ms TimeCoverageRelationStatistics Valid=361, Invalid=3179, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:04:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-05-02 23:04:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1163. [2021-05-02 23:04:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1078 states have (on average 1.1799628942486085) internal successors, (1272), 1116 states have internal predecessors, (1272), 59 states have call successors, (59), 26 states have call predecessors, (59), 25 states have return successors, (57), 20 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 23:04:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1388 transitions. [2021-05-02 23:04:38,083 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1388 transitions. Word has length 66 [2021-05-02 23:04:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:38,083 INFO L480 AbstractCegarLoop]: Abstraction has 1163 states and 1388 transitions. [2021-05-02 23:04:38,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 23:04:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1388 transitions. [2021-05-02 23:04:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:38,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:38,085 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:38,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:04:38,085 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 146305884, now seen corresponding path program 25 times [2021-05-02 23:04:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:38,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255535143] [2021-05-02 23:04:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:38,093 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:38,094 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:39,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:39,261 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 23:04:39,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:39,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255535143] [2021-05-02 23:04:39,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255535143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:39,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:39,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:04:39,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478914628] [2021-05-02 23:04:39,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:04:39,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:39,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:04:39,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:04:39,262 INFO L87 Difference]: Start difference. First operand 1163 states and 1388 transitions. Second operand has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 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 23:04:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:42,579 INFO L93 Difference]: Finished difference Result 1278 states and 1521 transitions. [2021-05-02 23:04:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:04:42,581 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 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 66 [2021-05-02 23:04:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:42,583 INFO L225 Difference]: With dead ends: 1278 [2021-05-02 23:04:42,583 INFO L226 Difference]: Without dead ends: 1276 [2021-05-02 23:04:42,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2205.3ms TimeCoverageRelationStatistics Valid=553, Invalid=3737, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:04:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-05-02 23:04:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1144. [2021-05-02 23:04:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1060 states have (on average 1.179245283018868) internal successors, (1250), 1097 states have internal predecessors, (1250), 58 states have call successors, (58), 26 states have call predecessors, (58), 25 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 23:04:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1364 transitions. [2021-05-02 23:04:43,184 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1364 transitions. Word has length 66 [2021-05-02 23:04:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:43,185 INFO L480 AbstractCegarLoop]: Abstraction has 1144 states and 1364 transitions. [2021-05-02 23:04:43,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 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 23:04:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1364 transitions. [2021-05-02 23:04:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:43,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:43,186 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:43,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:04:43,186 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1811130830, now seen corresponding path program 17 times [2021-05-02 23:04:43,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:43,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042661037] [2021-05-02 23:04:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:43,191 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:43,192 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:44,854 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 23:04:44,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:44,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042661037] [2021-05-02 23:04:44,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042661037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:44,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:44,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:04:44,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450644474] [2021-05-02 23:04:44,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:04:44,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:04:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:04:44,855 INFO L87 Difference]: Start difference. First operand 1144 states and 1364 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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 23:04:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:49,338 INFO L93 Difference]: Finished difference Result 1448 states and 1739 transitions. [2021-05-02 23:04:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:04:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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 66 [2021-05-02 23:04:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:49,342 INFO L225 Difference]: With dead ends: 1448 [2021-05-02 23:04:49,342 INFO L226 Difference]: Without dead ends: 1446 [2021-05-02 23:04:49,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 3295.7ms TimeCoverageRelationStatistics Valid=565, Invalid=3857, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:04:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-05-02 23:04:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1169. [2021-05-02 23:04:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1084 states have (on average 1.1808118081180812) internal successors, (1280), 1121 states have internal predecessors, (1280), 58 states have call successors, (58), 27 states have call predecessors, (58), 26 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 23:04:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1394 transitions. [2021-05-02 23:04:49,935 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1394 transitions. Word has length 66 [2021-05-02 23:04:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:49,935 INFO L480 AbstractCegarLoop]: Abstraction has 1169 states and 1394 transitions. [2021-05-02 23:04:49,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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 23:04:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1394 transitions. [2021-05-02 23:04:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:49,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:49,936 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:49,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:04:49,936 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 18 times [2021-05-02 23:04:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675061356] [2021-05-02 23:04:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:49,941 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:49,942 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:50,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:50,783 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 23:04:50,783 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:50,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675061356] [2021-05-02 23:04:50,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675061356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:50,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:50,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:04:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670261939] [2021-05-02 23:04:50,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:04:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:04:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:04:50,784 INFO L87 Difference]: Start difference. First operand 1169 states and 1394 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:04:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:53,215 INFO L93 Difference]: Finished difference Result 1288 states and 1532 transitions. [2021-05-02 23:04:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:04:53,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2021-05-02 23:04:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:53,246 INFO L225 Difference]: With dead ends: 1288 [2021-05-02 23:04:53,246 INFO L226 Difference]: Without dead ends: 1286 [2021-05-02 23:04:53,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1524.8ms TimeCoverageRelationStatistics Valid=366, Invalid=1890, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:04:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-05-02 23:04:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1188. [2021-05-02 23:04:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1102 states have (on average 1.1823956442831216) internal successors, (1303), 1139 states have internal predecessors, (1303), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 23:04:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1417 transitions. [2021-05-02 23:04:53,970 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1417 transitions. Word has length 66 [2021-05-02 23:04:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:53,971 INFO L480 AbstractCegarLoop]: Abstraction has 1188 states and 1417 transitions. [2021-05-02 23:04:53,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:04:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1417 transitions. [2021-05-02 23:04:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:53,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:53,972 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:53,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:04:53,973 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 19 times [2021-05-02 23:04:53,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:53,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577275224] [2021-05-02 23:04:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:53,978 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:53,979 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:54,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:54,894 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 23:04:54,894 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:54,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577275224] [2021-05-02 23:04:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [577275224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:04:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358097843] [2021-05-02 23:04:54,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:04:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:04:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:04:54,895 INFO L87 Difference]: Start difference. First operand 1188 states and 1417 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:04:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:58,039 INFO L93 Difference]: Finished difference Result 1316 states and 1566 transitions. [2021-05-02 23:04:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:04:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2021-05-02 23:04:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:58,043 INFO L225 Difference]: With dead ends: 1316 [2021-05-02 23:04:58,043 INFO L226 Difference]: Without dead ends: 1314 [2021-05-02 23:04:58,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1772.8ms TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:04:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-05-02 23:04:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1188. [2021-05-02 23:04:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1102 states have (on average 1.1823956442831216) internal successors, (1303), 1139 states have internal predecessors, (1303), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 23:04:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1417 transitions. [2021-05-02 23:04:58,654 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1417 transitions. Word has length 66 [2021-05-02 23:04:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:58,654 INFO L480 AbstractCegarLoop]: Abstraction has 1188 states and 1417 transitions. [2021-05-02 23:04:58,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:04:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1417 transitions. [2021-05-02 23:04:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:04:58,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:58,656 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:58,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:04:58,656 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1237330082, now seen corresponding path program 20 times [2021-05-02 23:04:58,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:58,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553497022] [2021-05-02 23:04:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:58,660 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:58,661 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:59,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:59,511 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 23:04:59,511 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:59,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553497022] [2021-05-02 23:04:59,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [553497022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:59,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:59,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:04:59,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252431592] [2021-05-02 23:04:59,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:04:59,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:59,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:04:59,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:04:59,512 INFO L87 Difference]: Start difference. First operand 1188 states and 1417 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:05:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:02,185 INFO L93 Difference]: Finished difference Result 1307 states and 1551 transitions. [2021-05-02 23:05:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:05:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2021-05-02 23:05:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:02,188 INFO L225 Difference]: With dead ends: 1307 [2021-05-02 23:05:02,188 INFO L226 Difference]: Without dead ends: 1305 [2021-05-02 23:05:02,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1489.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:05:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-05-02 23:05:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1167. [2021-05-02 23:05:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1083 states have (on average 1.1809787626962143) internal successors, (1279), 1118 states have internal predecessors, (1279), 56 states have call successors, (56), 28 states have call predecessors, (56), 27 states have return successors, (54), 20 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 23:05:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1389 transitions. [2021-05-02 23:05:02,793 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1389 transitions. Word has length 66 [2021-05-02 23:05:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:02,794 INFO L480 AbstractCegarLoop]: Abstraction has 1167 states and 1389 transitions. [2021-05-02 23:05:02,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:05:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1389 transitions. [2021-05-02 23:05:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:05:02,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:02,796 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:02,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:05:02,796 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1870934436, now seen corresponding path program 21 times [2021-05-02 23:05:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:02,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728705053] [2021-05-02 23:05:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:02,801 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:02,801 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:03,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:03,888 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 23:05:03,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728705053] [2021-05-02 23:05:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [728705053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:03,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:03,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:05:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453943585] [2021-05-02 23:05:03,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:05:03,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:05:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:05:03,890 INFO L87 Difference]: Start difference. First operand 1167 states and 1389 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:05:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:06,738 INFO L93 Difference]: Finished difference Result 1317 states and 1566 transitions. [2021-05-02 23:05:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:05:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2021-05-02 23:05:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:06,754 INFO L225 Difference]: With dead ends: 1317 [2021-05-02 23:05:06,754 INFO L226 Difference]: Without dead ends: 1315 [2021-05-02 23:05:06,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1767.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:05:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-05-02 23:05:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1158. [2021-05-02 23:05:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1075 states have (on average 1.1813953488372093) internal successors, (1270), 1109 states have internal predecessors, (1270), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (53), 20 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 23:05:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1378 transitions. [2021-05-02 23:05:07,426 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1378 transitions. Word has length 66 [2021-05-02 23:05:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:07,426 INFO L480 AbstractCegarLoop]: Abstraction has 1158 states and 1378 transitions. [2021-05-02 23:05:07,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 23:05:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1378 transitions. [2021-05-02 23:05:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:05:07,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:07,428 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-05-02 23:05:07,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:05:07,428 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 11 times [2021-05-02 23:05:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:07,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067288097] [2021-05-02 23:05:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:07,433 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:07,434 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:09,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 23:05:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-05-02 23:05:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:09,070 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 23:05:09,071 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067288097] [2021-05-02 23:05:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067288097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:09,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:09,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:05:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409165483] [2021-05-02 23:05:09,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:05:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:05:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:05:09,072 INFO L87 Difference]: Start difference. First operand 1158 states and 1378 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:05:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:15,415 INFO L93 Difference]: Finished difference Result 1276 states and 1512 transitions. [2021-05-02 23:05:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:05:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2021-05-02 23:05:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:15,418 INFO L225 Difference]: With dead ends: 1276 [2021-05-02 23:05:15,419 INFO L226 Difference]: Without dead ends: 1260 [2021-05-02 23:05:15,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 4749.9ms TimeCoverageRelationStatistics Valid=651, Invalid=6321, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:05:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-05-02 23:05:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1218. [2021-05-02 23:05:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1134 states have (on average 1.1790123456790123) internal successors, (1337), 1169 states have internal predecessors, (1337), 56 states have call successors, (56), 28 states have call predecessors, (56), 27 states have return successors, (54), 20 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 23:05:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1447 transitions. [2021-05-02 23:05:16,029 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1447 transitions. Word has length 69 [2021-05-02 23:05:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:16,030 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 1447 transitions. [2021-05-02 23:05:16,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:05:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1447 transitions. [2021-05-02 23:05:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:05:16,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:16,031 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:16,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:05:16,031 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1404533430, now seen corresponding path program 18 times [2021-05-02 23:05:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:16,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816102605] [2021-05-02 23:05:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:16,036 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:16,037 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:05:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:17,039 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 23:05:17,039 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:17,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816102605] [2021-05-02 23:05:17,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816102605] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:17,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:17,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:05:17,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210467166] [2021-05-02 23:05:17,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:05:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:05:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:05:17,040 INFO L87 Difference]: Start difference. First operand 1218 states and 1447 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:21,164 INFO L93 Difference]: Finished difference Result 1516 states and 1816 transitions. [2021-05-02 23:05:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:05:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-05-02 23:05:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:21,168 INFO L225 Difference]: With dead ends: 1516 [2021-05-02 23:05:21,168 INFO L226 Difference]: Without dead ends: 1514 [2021-05-02 23:05:21,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1986.2ms TimeCoverageRelationStatistics Valid=321, Invalid=2541, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:05:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-05-02 23:05:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1076. [2021-05-02 23:05:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1022 states have (on average 1.1937377690802349) internal successors, (1220), 1043 states have internal predecessors, (1220), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (33), 13 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:05:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1288 transitions. [2021-05-02 23:05:21,672 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1288 transitions. Word has length 68 [2021-05-02 23:05:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:21,672 INFO L480 AbstractCegarLoop]: Abstraction has 1076 states and 1288 transitions. [2021-05-02 23:05:21,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1288 transitions. [2021-05-02 23:05:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:05:21,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:21,674 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:21,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:05:21,674 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2068396432, now seen corresponding path program 19 times [2021-05-02 23:05:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:21,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019071581] [2021-05-02 23:05:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:21,679 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:21,680 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:22,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-02 23:05:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:22,823 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 23:05:22,823 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019071581] [2021-05-02 23:05:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019071581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:22,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:22,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:05:22,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224703113] [2021-05-02 23:05:22,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:05:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:05:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:05:22,824 INFO L87 Difference]: Start difference. First operand 1076 states and 1288 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:26,545 INFO L93 Difference]: Finished difference Result 1388 states and 1673 transitions. [2021-05-02 23:05:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:05:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-05-02 23:05:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:26,550 INFO L225 Difference]: With dead ends: 1388 [2021-05-02 23:05:26,550 INFO L226 Difference]: Without dead ends: 1386 [2021-05-02 23:05:26,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2096.4ms TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:05:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-05-02 23:05:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1107. [2021-05-02 23:05:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1050 states have (on average 1.1961904761904762) internal successors, (1256), 1073 states have internal predecessors, (1256), 38 states have call successors, (38), 19 states have call predecessors, (38), 18 states have return successors, (36), 14 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:05:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1330 transitions. [2021-05-02 23:05:27,119 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1330 transitions. Word has length 68 [2021-05-02 23:05:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:27,119 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 1330 transitions. [2021-05-02 23:05:27,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1330 transitions. [2021-05-02 23:05:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:05:27,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:27,121 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:27,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:05:27,121 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 12 times [2021-05-02 23:05:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:27,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330644744] [2021-05-02 23:05:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:27,126 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:27,127 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:28,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:28,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-05-02 23:05:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:28,930 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 23:05:28,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330644744] [2021-05-02 23:05:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [330644744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:28,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:28,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:05:28,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592345183] [2021-05-02 23:05:28,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:05:28,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:05:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:05:28,931 INFO L87 Difference]: Start difference. First operand 1107 states and 1330 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:29,671 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-02 23:05:33,362 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 23:05:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:39,061 INFO L93 Difference]: Finished difference Result 1347 states and 1617 transitions. [2021-05-02 23:05:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:05:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2021-05-02 23:05:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:39,064 INFO L225 Difference]: With dead ends: 1347 [2021-05-02 23:05:39,064 INFO L226 Difference]: Without dead ends: 1345 [2021-05-02 23:05:39,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4227 ImplicationChecksByTransitivity, 7135.7ms TimeCoverageRelationStatistics Valid=1433, Invalid=11449, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:05:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-05-02 23:05:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1130. [2021-05-02 23:05:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1074 states have (on average 1.1973929236499068) internal successors, (1286), 1097 states have internal predecessors, (1286), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:05:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1358 transitions. [2021-05-02 23:05:39,619 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1358 transitions. Word has length 69 [2021-05-02 23:05:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:39,619 INFO L480 AbstractCegarLoop]: Abstraction has 1130 states and 1358 transitions. [2021-05-02 23:05:39,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1358 transitions. [2021-05-02 23:05:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:05:39,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:39,621 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:39,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:05:39,621 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 13 times [2021-05-02 23:05:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:39,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077310628] [2021-05-02 23:05:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:39,626 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:39,627 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:41,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:41,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-05-02 23:05:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:41,572 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 23:05:41,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077310628] [2021-05-02 23:05:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077310628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:41,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:41,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:05:41,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126806208] [2021-05-02 23:05:41,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:05:41,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:41,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:05:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:05:41,573 INFO L87 Difference]: Start difference. First operand 1130 states and 1358 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:47,643 INFO L93 Difference]: Finished difference Result 1409 states and 1695 transitions. [2021-05-02 23:05:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:05:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2021-05-02 23:05:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:47,647 INFO L225 Difference]: With dead ends: 1409 [2021-05-02 23:05:47,647 INFO L226 Difference]: Without dead ends: 1407 [2021-05-02 23:05:47,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 4384.4ms TimeCoverageRelationStatistics Valid=517, Invalid=4885, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:05:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-05-02 23:05:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1145. [2021-05-02 23:05:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1088 states have (on average 1.197610294117647) internal successors, (1303), 1112 states have internal predecessors, (1303), 38 states have call successors, (38), 19 states have call predecessors, (38), 18 states have return successors, (36), 13 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:05:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1377 transitions. [2021-05-02 23:05:48,225 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1377 transitions. Word has length 69 [2021-05-02 23:05:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:48,225 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 1377 transitions. [2021-05-02 23:05:48,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1377 transitions. [2021-05-02 23:05:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:05:48,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:48,226 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:48,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:05:48,227 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 14 times [2021-05-02 23:05:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354808635] [2021-05-02 23:05:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:48,232 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:48,233 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:50,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:50,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-05-02 23:05:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:50,827 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 23:05:50,827 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354808635] [2021-05-02 23:05:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [354808635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:05:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033491659] [2021-05-02 23:05:50,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:05:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:05:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:05:50,829 INFO L87 Difference]: Start difference. First operand 1145 states and 1377 transitions. Second operand has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:05:51,775 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2021-05-02 23:05:52,051 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2021-05-02 23:05:52,309 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2021-05-02 23:05:52,951 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-05-02 23:05:53,126 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 15 [2021-05-02 23:05:53,420 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-05-02 23:05:54,072 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-02 23:05:54,337 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-05-02 23:05:54,539 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-02 23:05:55,077 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-05-02 23:05:55,497 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 23:05:56,236 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-02 23:05:56,463 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-02 23:05:56,871 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-02 23:05:57,584 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-02 23:05:57,961 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-02 23:06:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:00,950 INFO L93 Difference]: Finished difference Result 1276 states and 1533 transitions. [2021-05-02 23:06:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:06:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2021-05-02 23:06:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:00,955 INFO L225 Difference]: With dead ends: 1276 [2021-05-02 23:06:00,955 INFO L226 Difference]: Without dead ends: 1274 [2021-05-02 23:06:00,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 8845.8ms TimeCoverageRelationStatistics Valid=832, Invalid=7178, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:06:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-05-02 23:06:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1133. [2021-05-02 23:06:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1077 states have (on average 1.1977715877437325) internal successors, (1290), 1100 states have internal predecessors, (1290), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:06:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1362 transitions. [2021-05-02 23:06:01,522 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1362 transitions. Word has length 69 [2021-05-02 23:06:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:01,523 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 1362 transitions. [2021-05-02 23:06:01,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1362 transitions. [2021-05-02 23:06:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:01,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:01,524 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:01,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:06:01,524 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 15 times [2021-05-02 23:06:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985457636] [2021-05-02 23:06:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:01,530 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:01,531 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:04,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-05-02 23:06:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:04,116 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 23:06:04,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:04,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985457636] [2021-05-02 23:06:04,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [985457636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:04,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:04,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:06:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24382469] [2021-05-02 23:06:04,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:06:04,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:06:04,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:06:04,118 INFO L87 Difference]: Start difference. First operand 1133 states and 1362 transitions. Second operand has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:06,580 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-05-02 23:06:06,813 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-02 23:06:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:09,873 INFO L93 Difference]: Finished difference Result 1209 states and 1448 transitions. [2021-05-02 23:06:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:06:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2021-05-02 23:06:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:09,877 INFO L225 Difference]: With dead ends: 1209 [2021-05-02 23:06:09,877 INFO L226 Difference]: Without dead ends: 1207 [2021-05-02 23:06:09,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 4810.0ms TimeCoverageRelationStatistics Valid=402, Invalid=4020, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:06:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-05-02 23:06:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1108. [2021-05-02 23:06:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1055 states have (on average 1.2) internal successors, (1266), 1076 states have internal predecessors, (1266), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (33), 13 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:06:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1334 transitions. [2021-05-02 23:06:10,420 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1334 transitions. Word has length 69 [2021-05-02 23:06:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:10,420 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1334 transitions. [2021-05-02 23:06:10,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:06:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1334 transitions. [2021-05-02 23:06:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:06:10,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:10,422 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:10,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:06:10,422 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:10,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 20 times [2021-05-02 23:06:10,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:10,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124313362] [2021-05-02 23:06:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:10,430 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:10,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:11,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 23:06:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 23:06:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:11,085 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 23:06:11,085 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:11,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124313362] [2021-05-02 23:06:11,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124313362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:11,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:11,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:06:11,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053273909] [2021-05-02 23:06:11,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:06:11,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:06:11,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:06:11,086 INFO L87 Difference]: Start difference. First operand 1108 states and 1334 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:06:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:15,234 INFO L93 Difference]: Finished difference Result 1321 states and 1595 transitions. [2021-05-02 23:06:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:06:15,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-05-02 23:06:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:15,239 INFO L225 Difference]: With dead ends: 1321 [2021-05-02 23:06:15,239 INFO L226 Difference]: Without dead ends: 1319 [2021-05-02 23:06:15,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1558.7ms TimeCoverageRelationStatistics Valid=241, Invalid=2015, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:06:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-05-02 23:06:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1150. [2021-05-02 23:06:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1091 states have (on average 1.1952337305224565) internal successors, (1304), 1116 states have internal predecessors, (1304), 41 states have call successors, (41), 18 states have call predecessors, (41), 17 states have return successors, (39), 15 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:06:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1384 transitions. [2021-05-02 23:06:15,885 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1384 transitions. Word has length 71 [2021-05-02 23:06:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:15,885 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1384 transitions. [2021-05-02 23:06:15,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:06:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1384 transitions. [2021-05-02 23:06:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:15,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:15,887 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:15,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:06:15,887 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash 353640872, now seen corresponding path program 26 times [2021-05-02 23:06:15,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:15,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810514284] [2021-05-02 23:06:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:15,893 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:15,894 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:16,385 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 23:06:16,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:16,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810514284] [2021-05-02 23:06:16,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [810514284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:16,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:16,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:06:16,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666436866] [2021-05-02 23:06:16,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:06:16,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:06:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:06:16,386 INFO L87 Difference]: Start difference. First operand 1150 states and 1384 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 23:06:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:19,778 INFO L93 Difference]: Finished difference Result 2422 states and 2994 transitions. [2021-05-02 23:06:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:06:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 69 [2021-05-02 23:06:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:19,783 INFO L225 Difference]: With dead ends: 2422 [2021-05-02 23:06:19,783 INFO L226 Difference]: Without dead ends: 2118 [2021-05-02 23:06:19,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1212.9ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:06:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-05-02 23:06:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1619. [2021-05-02 23:06:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1560 states have (on average 1.2128205128205127) internal successors, (1892), 1585 states have internal predecessors, (1892), 41 states have call successors, (41), 18 states have call predecessors, (41), 17 states have return successors, (39), 15 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:06:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1972 transitions. [2021-05-02 23:06:20,607 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1972 transitions. Word has length 69 [2021-05-02 23:06:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:20,607 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 1972 transitions. [2021-05-02 23:06:20,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 23:06:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1972 transitions. [2021-05-02 23:06:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:20,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:20,609 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:20,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:06:20,609 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 27 times [2021-05-02 23:06:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558182686] [2021-05-02 23:06:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:20,615 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:20,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:21,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:21,313 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 23:06:21,313 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558182686] [2021-05-02 23:06:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558182686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:21,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:06:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932274996] [2021-05-02 23:06:21,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:06:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:06:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:06:21,314 INFO L87 Difference]: Start difference. First operand 1619 states and 1972 transitions. Second operand has 23 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 23:06:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:27,044 INFO L93 Difference]: Finished difference Result 2136 states and 2622 transitions. [2021-05-02 23:06:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:06:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 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 69 [2021-05-02 23:06:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:27,050 INFO L225 Difference]: With dead ends: 2136 [2021-05-02 23:06:27,050 INFO L226 Difference]: Without dead ends: 2134 [2021-05-02 23:06:27,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3218.9ms TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:06:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-05-02 23:06:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1723. [2021-05-02 23:06:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1662 states have (on average 1.2196149217809868) internal successors, (2027), 1688 states have internal predecessors, (2027), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:06:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2109 transitions. [2021-05-02 23:06:27,974 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2109 transitions. Word has length 69 [2021-05-02 23:06:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:27,974 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 2109 transitions. [2021-05-02 23:06:27,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 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 23:06:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2109 transitions. [2021-05-02 23:06:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:27,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:27,976 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:27,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:06:27,976 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 22 times [2021-05-02 23:06:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:27,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691151339] [2021-05-02 23:06:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:27,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:27,984 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:28,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:28,162 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 23:06:28,162 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:28,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691151339] [2021-05-02 23:06:28,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691151339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:28,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:28,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:06:28,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907088490] [2021-05-02 23:06:28,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:06:28,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:06:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:06:28,163 INFO L87 Difference]: Start difference. First operand 1723 states and 2109 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 23:06:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:30,848 INFO L93 Difference]: Finished difference Result 2012 states and 2463 transitions. [2021-05-02 23:06:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:06:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 69 [2021-05-02 23:06:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:30,852 INFO L225 Difference]: With dead ends: 2012 [2021-05-02 23:06:30,852 INFO L226 Difference]: Without dead ends: 1979 [2021-05-02 23:06:30,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 751.9ms TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:06:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-05-02 23:06:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1730. [2021-05-02 23:06:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1669 states have (on average 1.21929298981426) internal successors, (2035), 1695 states have internal predecessors, (2035), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:06:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2117 transitions. [2021-05-02 23:06:31,745 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2117 transitions. Word has length 69 [2021-05-02 23:06:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:31,745 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 2117 transitions. [2021-05-02 23:06:31,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 23:06:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2117 transitions. [2021-05-02 23:06:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:31,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:31,747 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:31,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:06:31,747 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2103292271, now seen corresponding path program 28 times [2021-05-02 23:06:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:31,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604591761] [2021-05-02 23:06:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:31,752 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:31,753 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:32,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:32,631 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 23:06:32,631 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:32,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604591761] [2021-05-02 23:06:32,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [604591761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:32,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:32,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:06:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359047809] [2021-05-02 23:06:32,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:06:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:06:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:06:32,632 INFO L87 Difference]: Start difference. First operand 1730 states and 2117 transitions. Second operand has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 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 23:06:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:38,053 INFO L93 Difference]: Finished difference Result 1953 states and 2386 transitions. [2021-05-02 23:06:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:06:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 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 69 [2021-05-02 23:06:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:38,059 INFO L225 Difference]: With dead ends: 1953 [2021-05-02 23:06:38,059 INFO L226 Difference]: Without dead ends: 1951 [2021-05-02 23:06:38,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3046.3ms TimeCoverageRelationStatistics Valid=584, Invalid=2956, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:06:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-05-02 23:06:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1751. [2021-05-02 23:06:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1690 states have (on average 1.2207100591715976) internal successors, (2063), 1716 states have internal predecessors, (2063), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (40), 15 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:06:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2145 transitions. [2021-05-02 23:06:38,998 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2145 transitions. Word has length 69 [2021-05-02 23:06:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:38,998 INFO L480 AbstractCegarLoop]: Abstraction has 1751 states and 2145 transitions. [2021-05-02 23:06:38,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 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 23:06:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2145 transitions. [2021-05-02 23:06:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:39,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:39,000 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:39,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:06:39,000 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 23 times [2021-05-02 23:06:39,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:39,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263711648] [2021-05-02 23:06:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:39,006 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:39,007 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:40,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:40,341 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 23:06:40,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263711648] [2021-05-02 23:06:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263711648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:40,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:40,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:06:40,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428069323] [2021-05-02 23:06:40,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:06:40,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:06:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:06:40,343 INFO L87 Difference]: Start difference. First operand 1751 states and 2145 transitions. Second operand has 27 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 23:06:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:52,318 INFO L93 Difference]: Finished difference Result 2150 states and 2617 transitions. [2021-05-02 23:06:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:06:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 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 69 [2021-05-02 23:06:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:52,324 INFO L225 Difference]: With dead ends: 2150 [2021-05-02 23:06:52,324 INFO L226 Difference]: Without dead ends: 2148 [2021-05-02 23:06:52,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 5952.4ms TimeCoverageRelationStatistics Valid=765, Invalid=8165, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:06:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-05-02 23:06:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1844. [2021-05-02 23:06:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1774 states have (on average 1.2198421645997746) internal successors, (2164), 1806 states have internal predecessors, (2164), 48 states have call successors, (48), 22 states have call predecessors, (48), 21 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 23:06:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2258 transitions. [2021-05-02 23:06:53,333 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2258 transitions. Word has length 69 [2021-05-02 23:06:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:53,333 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 2258 transitions. [2021-05-02 23:06:53,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 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 23:06:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2258 transitions. [2021-05-02 23:06:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:06:53,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:53,335 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:53,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:06:53,335 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 194554805, now seen corresponding path program 29 times [2021-05-02 23:06:53,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:53,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108426207] [2021-05-02 23:06:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:53,348 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:53,349 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:55,368 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 23:06:55,368 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108426207] [2021-05-02 23:06:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108426207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:55,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:55,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:06:55,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934010537] [2021-05-02 23:06:55,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:06:55,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:06:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:06:55,369 INFO L87 Difference]: Start difference. First operand 1844 states and 2258 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 23:07:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:02,562 INFO L93 Difference]: Finished difference Result 2130 states and 2592 transitions. [2021-05-02 23:07:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:07:02,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 69 [2021-05-02 23:07:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:02,591 INFO L225 Difference]: With dead ends: 2130 [2021-05-02 23:07:02,592 INFO L226 Difference]: Without dead ends: 2128 [2021-05-02 23:07:02,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 4064.9ms TimeCoverageRelationStatistics Valid=409, Invalid=3251, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:07:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-05-02 23:07:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1872. [2021-05-02 23:07:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1801 states have (on average 1.220988339811216) internal successors, (2199), 1833 states have internal predecessors, (2199), 48 states have call successors, (48), 23 states have call predecessors, (48), 22 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 23:07:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2293 transitions. [2021-05-02 23:07:03,665 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2293 transitions. Word has length 69 [2021-05-02 23:07:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:03,686 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 2293 transitions. [2021-05-02 23:07:03,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 23:07:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2293 transitions. [2021-05-02 23:07:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:07:03,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:03,688 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:03,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:07:03,688 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2116173301, now seen corresponding path program 30 times [2021-05-02 23:07:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:03,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327466447] [2021-05-02 23:07:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:03,694 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:03,695 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:04,831 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-05-02 23:07:05,412 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-05-02 23:07:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:06,181 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 23:07:06,181 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:06,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327466447] [2021-05-02 23:07:06,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327466447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:06,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:06,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:07:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977315725] [2021-05-02 23:07:06,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:07:06,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:07:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:07:06,182 INFO L87 Difference]: Start difference. First operand 1872 states and 2293 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 23:07:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:14,359 INFO L93 Difference]: Finished difference Result 2159 states and 2630 transitions. [2021-05-02 23:07:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:07:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 69 [2021-05-02 23:07:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:14,366 INFO L225 Difference]: With dead ends: 2159 [2021-05-02 23:07:14,366 INFO L226 Difference]: Without dead ends: 2157 [2021-05-02 23:07:14,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 5053.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:07:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-05-02 23:07:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1903. [2021-05-02 23:07:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1830 states have (on average 1.221311475409836) internal successors, (2235), 1863 states have internal predecessors, (2235), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (47), 15 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 23:07:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2331 transitions. [2021-05-02 23:07:15,430 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2331 transitions. Word has length 69 [2021-05-02 23:07:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:15,430 INFO L480 AbstractCegarLoop]: Abstraction has 1903 states and 2331 transitions. [2021-05-02 23:07:15,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 23:07:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2331 transitions. [2021-05-02 23:07:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:07:15,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:15,432 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:15,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:07:15,432 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 24 times [2021-05-02 23:07:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:15,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295667884] [2021-05-02 23:07:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:15,440 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:15,441 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:17,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:17,984 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 23:07:17,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:17,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295667884] [2021-05-02 23:07:17,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295667884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:17,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:17,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:07:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434440477] [2021-05-02 23:07:17,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:07:17,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:07:17,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:07:17,986 INFO L87 Difference]: Start difference. First operand 1903 states and 2331 transitions. Second operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 23:07:21,573 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-05-02 23:07:21,755 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-02 23:07:22,094 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2021-05-02 23:07:22,428 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-05-02 23:07:23,560 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-05-02 23:07:24,131 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-05-02 23:07:24,461 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-02 23:07:24,724 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2021-05-02 23:07:26,156 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-05-02 23:07:26,388 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-05-02 23:07:26,926 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-02 23:07:27,437 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-05-02 23:07:27,668 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-05-02 23:07:28,523 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-05-02 23:07:28,909 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-02 23:07:29,233 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-05-02 23:07:29,625 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-02 23:07:30,364 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-05-02 23:07:32,037 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2021-05-02 23:07:32,404 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-05-02 23:07:32,987 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-05-02 23:07:33,290 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2021-05-02 23:07:33,576 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-02 23:07:33,915 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-05-02 23:07:34,143 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-05-02 23:07:34,469 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-05-02 23:07:35,022 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-05-02 23:07:35,874 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-02 23:07:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:36,610 INFO L93 Difference]: Finished difference Result 2407 states and 2926 transitions. [2021-05-02 23:07:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:07:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 69 [2021-05-02 23:07:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:36,626 INFO L225 Difference]: With dead ends: 2407 [2021-05-02 23:07:36,626 INFO L226 Difference]: Without dead ends: 2405 [2021-05-02 23:07:36,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 11489.6ms TimeCoverageRelationStatistics Valid=1161, Invalid=8739, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:07:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-05-02 23:07:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1968. [2021-05-02 23:07:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1890 states have (on average 1.2195767195767195) internal successors, (2305), 1926 states have internal predecessors, (2305), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 15 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 23:07:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2407 transitions. [2021-05-02 23:07:37,816 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2407 transitions. Word has length 69 [2021-05-02 23:07:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:37,816 INFO L480 AbstractCegarLoop]: Abstraction has 1968 states and 2407 transitions. [2021-05-02 23:07:37,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 23:07:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2407 transitions. [2021-05-02 23:07:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:07:37,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:37,818 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:37,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:07:37,818 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash -141333981, now seen corresponding path program 31 times [2021-05-02 23:07:37,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:37,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553165560] [2021-05-02 23:07:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:37,825 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:37,826 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:39,190 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-05-02 23:07:40,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:40,309 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 23:07:40,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553165560] [2021-05-02 23:07:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553165560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:07:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344981623] [2021-05-02 23:07:40,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:07:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:07:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:07:40,310 INFO L87 Difference]: Start difference. First operand 1968 states and 2407 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 23:07:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:49,706 INFO L93 Difference]: Finished difference Result 2384 states and 2900 transitions. [2021-05-02 23:07:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:07:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 69 [2021-05-02 23:07:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:49,713 INFO L225 Difference]: With dead ends: 2384 [2021-05-02 23:07:49,713 INFO L226 Difference]: Without dead ends: 2382 [2021-05-02 23:07:49,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 4759.0ms TimeCoverageRelationStatistics Valid=345, Invalid=3315, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:07:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-05-02 23:07:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1972. [2021-05-02 23:07:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1892 states have (on average 1.2188160676532769) internal successors, (2306), 1929 states have internal predecessors, (2306), 53 states have call successors, (53), 27 states have call predecessors, (53), 26 states have return successors, (51), 15 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 23:07:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2410 transitions. [2021-05-02 23:07:50,844 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2410 transitions. Word has length 69 [2021-05-02 23:07:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:50,844 INFO L480 AbstractCegarLoop]: Abstraction has 1972 states and 2410 transitions. [2021-05-02 23:07:50,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 23:07:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2410 transitions. [2021-05-02 23:07:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:07:50,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:50,846 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:50,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:07:50,846 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 25 times [2021-05-02 23:07:50,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:50,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517044670] [2021-05-02 23:07:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:50,854 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:50,855 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:52,117 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-02 23:07:52,325 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-05-02 23:07:52,783 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-02 23:07:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:54,203 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 23:07:54,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:54,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517044670] [2021-05-02 23:07:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [517044670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:54,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:54,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:07:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064493814] [2021-05-02 23:07:54,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:07:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:07:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:07:54,205 INFO L87 Difference]: Start difference. First operand 1972 states and 2410 transitions. Second operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 23:07:55,341 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-02 23:08:03,843 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-02 23:08:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:06,886 INFO L93 Difference]: Finished difference Result 2360 states and 2868 transitions. [2021-05-02 23:08:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:08:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 69 [2021-05-02 23:08:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:06,894 INFO L225 Difference]: With dead ends: 2360 [2021-05-02 23:08:06,894 INFO L226 Difference]: Without dead ends: 2358 [2021-05-02 23:08:06,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 8124.7ms TimeCoverageRelationStatistics Valid=487, Invalid=5213, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:08:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-05-02 23:08:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2023. [2021-05-02 23:08:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1943 states have (on average 1.2213072568193515) internal successors, (2373), 1980 states have internal predecessors, (2373), 53 states have call successors, (53), 27 states have call predecessors, (53), 26 states have return successors, (51), 15 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 23:08:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2477 transitions. [2021-05-02 23:08:08,115 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2477 transitions. Word has length 69 [2021-05-02 23:08:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:08,115 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 2477 transitions. [2021-05-02 23:08:08,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 23:08:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2477 transitions. [2021-05-02 23:08:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:08:08,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:08,117 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:08,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:08:08,117 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 26 times [2021-05-02 23:08:08,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:08,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936374065] [2021-05-02 23:08:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:08,125 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:08,126 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:10,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:10,469 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 23:08:10,470 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:10,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936374065] [2021-05-02 23:08:10,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [936374065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:10,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:10,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:08:10,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039757812] [2021-05-02 23:08:10,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:08:10,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:08:10,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:08:10,471 INFO L87 Difference]: Start difference. First operand 2023 states and 2477 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 23:08:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:19,583 INFO L93 Difference]: Finished difference Result 2337 states and 2853 transitions. [2021-05-02 23:08:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:08:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 69 [2021-05-02 23:08:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:19,590 INFO L225 Difference]: With dead ends: 2337 [2021-05-02 23:08:19,590 INFO L226 Difference]: Without dead ends: 2335 [2021-05-02 23:08:19,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 4724.6ms TimeCoverageRelationStatistics Valid=320, Invalid=2986, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:08:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-02 23:08:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1935. [2021-05-02 23:08:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1866 states have (on average 1.2245444801714898) internal successors, (2285), 1897 states have internal predecessors, (2285), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 13 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 23:08:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2373 transitions. [2021-05-02 23:08:20,668 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2373 transitions. Word has length 69 [2021-05-02 23:08:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:20,668 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 2373 transitions. [2021-05-02 23:08:20,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 23:08:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2373 transitions. [2021-05-02 23:08:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:08:20,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:20,670 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 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] [2021-05-02 23:08:20,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:08:20,670 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash -306682746, now seen corresponding path program 16 times [2021-05-02 23:08:20,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:20,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973366081] [2021-05-02 23:08:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:20,683 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:20,684 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:21,769 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-05-02 23:08:21,930 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-05-02 23:08:22,117 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-05-02 23:08:23,395 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-02 23:08:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:24,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 23:08:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:24,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:08:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:24,399 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 23:08:24,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:24,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973366081] [2021-05-02 23:08:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [973366081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:24,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:24,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:08:24,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247728384] [2021-05-02 23:08:24,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:08:24,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:08:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:08:24,401 INFO L87 Difference]: Start difference. First operand 1935 states and 2373 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:08:26,070 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-05-02 23:08:26,465 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-02 23:08:26,942 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:08:27,208 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-02 23:08:27,610 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-05-02 23:08:28,079 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-02 23:08:28,455 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-05-02 23:08:29,083 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-02 23:08:29,956 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-05-02 23:08:31,994 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-05-02 23:08:32,680 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 23:08:33,627 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-02 23:08:34,928 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-02 23:08:35,609 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-05-02 23:08:35,867 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-02 23:08:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:36,622 INFO L93 Difference]: Finished difference Result 2120 states and 2594 transitions. [2021-05-02 23:08:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:08:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-05-02 23:08:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:36,629 INFO L225 Difference]: With dead ends: 2120 [2021-05-02 23:08:36,629 INFO L226 Difference]: Without dead ends: 2077 [2021-05-02 23:08:36,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 9484.9ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:08:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-05-02 23:08:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2032. [2021-05-02 23:08:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1959 states have (on average 1.2256253190403268) internal successors, (2401), 1993 states have internal predecessors, (2401), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (47), 14 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 23:08:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2497 transitions. [2021-05-02 23:08:37,808 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2497 transitions. Word has length 72 [2021-05-02 23:08:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 2032 states and 2497 transitions. [2021-05-02 23:08:37,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:08:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2497 transitions. [2021-05-02 23:08:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:08:37,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:37,810 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 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] [2021-05-02 23:08:37,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:08:37,810 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 17 times [2021-05-02 23:08:37,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:37,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895911626] [2021-05-02 23:08:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:37,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:37,822 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:38,365 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-02 23:08:38,547 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-05-02 23:08:39,155 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:08:39,309 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-05-02 23:08:40,280 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-02 23:08:41,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 23:08:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:41,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:08:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:41,146 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 23:08:41,146 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:41,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895911626] [2021-05-02 23:08:41,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895911626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:41,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:41,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:08:41,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965434905] [2021-05-02 23:08:41,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:08:41,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:08:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:08:41,148 INFO L87 Difference]: Start difference. First operand 2032 states and 2497 transitions. Second operand has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:08:42,397 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-02 23:08:42,667 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-02 23:08:43,065 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-02 23:08:43,686 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-02 23:08:44,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:08:44,461 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 23:08:44,897 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 23:08:45,266 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-02 23:08:45,571 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-02 23:08:45,807 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-02 23:08:46,993 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-02 23:08:49,365 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-02 23:08:49,929 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-02 23:08:50,465 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-02 23:08:51,024 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-02 23:08:51,870 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-02 23:08:52,488 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-02 23:08:52,971 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-05-02 23:08:53,275 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-02 23:08:53,793 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-02 23:08:54,086 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-05-02 23:08:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:54,721 INFO L93 Difference]: Finished difference Result 2074 states and 2541 transitions. [2021-05-02 23:08:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:08:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-05-02 23:08:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:54,731 INFO L225 Difference]: With dead ends: 2074 [2021-05-02 23:08:54,731 INFO L226 Difference]: Without dead ends: 1997 [2021-05-02 23:08:54,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 10036.9ms TimeCoverageRelationStatistics Valid=513, Invalid=5187, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:08:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-05-02 23:08:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1815. [2021-05-02 23:08:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1756 states have (on average 1.2317767653758542) internal successors, (2163), 1784 states have internal predecessors, (2163), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (38), 10 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:08:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2240 transitions. [2021-05-02 23:08:55,840 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2240 transitions. Word has length 72 [2021-05-02 23:08:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:55,840 INFO L480 AbstractCegarLoop]: Abstraction has 1815 states and 2240 transitions. [2021-05-02 23:08:55,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:08:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2240 transitions. [2021-05-02 23:08:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:08:55,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:55,843 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:55,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:08:55,843 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 7 times [2021-05-02 23:08:55,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:55,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138865938] [2021-05-02 23:08:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:55,855 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:55,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:56,285 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-05-02 23:08:57,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:08:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:08:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:57,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-05-02 23:08:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:57,325 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 23:08:57,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138865938] [2021-05-02 23:08:57,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138865938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:57,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:57,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:08:57,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55771349] [2021-05-02 23:08:57,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:08:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:08:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:08:57,326 INFO L87 Difference]: Start difference. First operand 1815 states and 2240 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:09:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:02,237 INFO L93 Difference]: Finished difference Result 1936 states and 2378 transitions. [2021-05-02 23:09:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:09:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2021-05-02 23:09:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:02,246 INFO L225 Difference]: With dead ends: 1936 [2021-05-02 23:09:02,246 INFO L226 Difference]: Without dead ends: 1934 [2021-05-02 23:09:02,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2444.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:09:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2021-05-02 23:09:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1905. [2021-05-02 23:09:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1828 states have (on average 1.2226477024070022) internal successors, (2235), 1865 states have internal predecessors, (2235), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (55), 18 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 23:09:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2346 transitions. [2021-05-02 23:09:03,548 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2346 transitions. Word has length 73 [2021-05-02 23:09:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:03,548 INFO L480 AbstractCegarLoop]: Abstraction has 1905 states and 2346 transitions. [2021-05-02 23:09:03,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:09:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2346 transitions. [2021-05-02 23:09:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:09:03,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:03,553 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:03,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:09:03,553 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:03,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 21 times [2021-05-02 23:09:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:03,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060897110] [2021-05-02 23:09:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:03,565 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:03,567 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:06,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:06,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 23:09:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:06,405 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 23:09:06,406 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:06,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060897110] [2021-05-02 23:09:06,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060897110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:06,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:06,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:09:06,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855359506] [2021-05-02 23:09:06,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:09:06,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:09:06,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:09:06,407 INFO L87 Difference]: Start difference. First operand 1905 states and 2346 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:10,859 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:09:16,478 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 23:09:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:17,074 INFO L93 Difference]: Finished difference Result 2205 states and 2701 transitions. [2021-05-02 23:09:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:09:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-05-02 23:09:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:17,082 INFO L225 Difference]: With dead ends: 2205 [2021-05-02 23:09:17,082 INFO L226 Difference]: Without dead ends: 2203 [2021-05-02 23:09:17,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 6586.0ms TimeCoverageRelationStatistics Valid=462, Invalid=3320, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:09:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-05-02 23:09:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1916. [2021-05-02 23:09:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1834 states have (on average 1.2208287895310797) internal successors, (2239), 1873 states have internal predecessors, (2239), 60 states have call successors, (60), 22 states have call predecessors, (60), 21 states have return successors, (59), 20 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 23:09:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2358 transitions. [2021-05-02 23:09:18,438 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2358 transitions. Word has length 71 [2021-05-02 23:09:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:18,438 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2358 transitions. [2021-05-02 23:09:18,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2358 transitions. [2021-05-02 23:09:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:09:18,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:18,441 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:18,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:09:18,441 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 22 times [2021-05-02 23:09:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535218277] [2021-05-02 23:09:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:18,447 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:18,448 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:19,087 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-05-02 23:09:20,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 23:09:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:20,355 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 23:09:20,355 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:20,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535218277] [2021-05-02 23:09:20,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [535218277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:20,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:20,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:09:20,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84382999] [2021-05-02 23:09:20,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:09:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:09:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:09:20,357 INFO L87 Difference]: Start difference. First operand 1916 states and 2358 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:22,429 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-02 23:09:23,172 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-02 23:09:23,607 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-05-02 23:09:25,307 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-05-02 23:09:25,913 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-05-02 23:09:26,200 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-02 23:09:27,478 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-02 23:09:27,760 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-05-02 23:09:29,063 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-05-02 23:09:29,853 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-02 23:09:30,333 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-02 23:09:31,271 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-05-02 23:09:32,482 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-02 23:09:32,794 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 23:09:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:35,670 INFO L93 Difference]: Finished difference Result 2533 states and 3121 transitions. [2021-05-02 23:09:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:09:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-05-02 23:09:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:35,680 INFO L225 Difference]: With dead ends: 2533 [2021-05-02 23:09:35,680 INFO L226 Difference]: Without dead ends: 2531 [2021-05-02 23:09:35,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 8490.3ms TimeCoverageRelationStatistics Valid=701, Invalid=5461, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:09:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-05-02 23:09:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2054. [2021-05-02 23:09:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1959 states have (on average 1.218989280245023) internal successors, (2388), 2003 states have internal predecessors, (2388), 71 states have call successors, (71), 24 states have call predecessors, (71), 23 states have return successors, (70), 26 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 23:09:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2529 transitions. [2021-05-02 23:09:37,351 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2529 transitions. Word has length 71 [2021-05-02 23:09:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:37,351 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 2529 transitions. [2021-05-02 23:09:37,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2529 transitions. [2021-05-02 23:09:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:09:37,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:37,354 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:37,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:09:37,354 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 23 times [2021-05-02 23:09:37,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:37,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569966214] [2021-05-02 23:09:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:37,365 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:37,366 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:39,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 23:09:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:39,676 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 23:09:39,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:39,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569966214] [2021-05-02 23:09:39,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [569966214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:39,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:39,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:09:39,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9676589] [2021-05-02 23:09:39,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:09:39,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:09:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:09:39,678 INFO L87 Difference]: Start difference. First operand 2054 states and 2529 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:41,914 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-02 23:09:42,232 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-05-02 23:09:43,205 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-05-02 23:09:43,504 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-05-02 23:09:43,860 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-02 23:09:44,562 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:09:44,891 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-05-02 23:09:45,336 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-02 23:09:46,133 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-02 23:09:46,563 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-05-02 23:09:46,882 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-05-02 23:09:47,373 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-05-02 23:09:48,987 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-05-02 23:09:49,260 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-02 23:09:49,691 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-02 23:09:50,641 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-05-02 23:09:50,855 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 23:09:51,166 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-02 23:09:52,185 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-02 23:09:53,274 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 23:09:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:55,849 INFO L93 Difference]: Finished difference Result 2385 states and 2929 transitions. [2021-05-02 23:09:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:09:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-05-02 23:09:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:55,859 INFO L225 Difference]: With dead ends: 2385 [2021-05-02 23:09:55,859 INFO L226 Difference]: Without dead ends: 2383 [2021-05-02 23:09:55,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 9781.9ms TimeCoverageRelationStatistics Valid=597, Invalid=4515, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:09:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-05-02 23:09:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2076. [2021-05-02 23:09:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1980 states have (on average 1.2196969696969697) internal successors, (2415), 2024 states have internal predecessors, (2415), 71 states have call successors, (71), 25 states have call predecessors, (71), 24 states have return successors, (70), 26 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 23:09:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2556 transitions. [2021-05-02 23:09:57,500 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2556 transitions. Word has length 71 [2021-05-02 23:09:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:57,501 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 2556 transitions. [2021-05-02 23:09:57,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:09:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2556 transitions. [2021-05-02 23:09:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:09:57,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:57,503 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:57,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:09:57,503 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 24 times [2021-05-02 23:09:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:57,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218143939] [2021-05-02 23:09:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:57,516 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:57,517 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:58,409 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:10:00,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:00,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 23:10:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:00,896 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 23:10:00,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218143939] [2021-05-02 23:10:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [218143939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:10:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24226407] [2021-05-02 23:10:00,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:10:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:10:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:10:00,898 INFO L87 Difference]: Start difference. First operand 2076 states and 2556 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:02,960 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-02 23:10:03,787 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-02 23:10:05,392 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-05-02 23:10:05,901 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 23 [2021-05-02 23:10:07,582 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-02 23:10:08,543 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-05-02 23:10:09,110 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-02 23:10:09,814 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-05-02 23:10:10,518 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-05-02 23:10:10,706 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-05-02 23:10:11,358 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:10:11,927 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-05-02 23:10:13,495 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-02 23:10:13,892 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-02 23:10:14,397 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-02 23:10:14,867 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-02 23:10:15,889 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 23:10:16,339 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:10:17,778 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-02 23:10:18,354 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-02 23:10:18,910 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 23:10:19,355 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 23:10:19,653 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:10:20,143 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-02 23:10:20,904 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-02 23:10:21,207 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-02 23:10:22,143 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 23:10:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:23,083 INFO L93 Difference]: Finished difference Result 2341 states and 2867 transitions. [2021-05-02 23:10:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:10:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-05-02 23:10:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:23,093 INFO L225 Difference]: With dead ends: 2341 [2021-05-02 23:10:23,093 INFO L226 Difference]: Without dead ends: 2339 [2021-05-02 23:10:23,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 14214.6ms TimeCoverageRelationStatistics Valid=732, Invalid=6074, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:10:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-05-02 23:10:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2088. [2021-05-02 23:10:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1990 states have (on average 1.2180904522613065) internal successors, (2424), 2036 states have internal predecessors, (2424), 73 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 26 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 23:10:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2569 transitions. [2021-05-02 23:10:24,866 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2569 transitions. Word has length 71 [2021-05-02 23:10:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:24,867 INFO L480 AbstractCegarLoop]: Abstraction has 2088 states and 2569 transitions. [2021-05-02 23:10:24,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2569 transitions. [2021-05-02 23:10:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:10:24,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:24,869 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:24,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:10:24,869 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 18 times [2021-05-02 23:10:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:24,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258511725] [2021-05-02 23:10:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:24,879 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:24,881 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:26,362 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-02 23:10:27,535 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-02 23:10:27,872 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-02 23:10:28,091 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-05-02 23:10:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:29,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:10:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:29,270 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 23:10:29,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:29,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258511725] [2021-05-02 23:10:29,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [258511725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:29,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:29,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:10:29,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502946297] [2021-05-02 23:10:29,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:10:29,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:10:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:10:29,272 INFO L87 Difference]: Start difference. First operand 2088 states and 2569 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:31,714 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-02 23:10:31,934 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 23:10:32,548 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-02 23:10:34,019 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:10:35,496 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-02 23:10:35,755 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-05-02 23:10:36,037 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-02 23:10:36,301 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 23:10:37,547 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-05-02 23:10:38,725 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-05-02 23:10:45,175 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 23:10:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:46,310 INFO L93 Difference]: Finished difference Result 2346 states and 2876 transitions. [2021-05-02 23:10:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:10:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-05-02 23:10:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:46,321 INFO L225 Difference]: With dead ends: 2346 [2021-05-02 23:10:46,321 INFO L226 Difference]: Without dead ends: 2344 [2021-05-02 23:10:46,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 10686.4ms TimeCoverageRelationStatistics Valid=673, Invalid=5969, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:10:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-05-02 23:10:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2107. [2021-05-02 23:10:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2008 states have (on average 1.217629482071713) internal successors, (2445), 2054 states have internal predecessors, (2445), 73 states have call successors, (73), 26 states have call predecessors, (73), 25 states have return successors, (72), 26 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 23:10:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2590 transitions. [2021-05-02 23:10:48,119 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2590 transitions. Word has length 72 [2021-05-02 23:10:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:48,119 INFO L480 AbstractCegarLoop]: Abstraction has 2107 states and 2590 transitions. [2021-05-02 23:10:48,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2590 transitions. [2021-05-02 23:10:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:10:48,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:48,122 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:48,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:10:48,122 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 19 times [2021-05-02 23:10:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:48,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110995258] [2021-05-02 23:10:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:48,131 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:48,132 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:49,411 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2021-05-02 23:10:49,585 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-05-02 23:10:49,783 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2021-05-02 23:10:49,978 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-05-02 23:10:51,258 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-05-02 23:10:51,854 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 23:10:52,101 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-02 23:10:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:10:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:53,799 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 23:10:53,800 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:53,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110995258] [2021-05-02 23:10:53,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110995258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:53,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:53,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:10:53,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206928475] [2021-05-02 23:10:53,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:10:53,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:10:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:10:53,803 INFO L87 Difference]: Start difference. First operand 2107 states and 2590 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:10:55,158 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-02 23:10:55,934 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 12 [2021-05-02 23:10:56,461 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-02 23:10:56,918 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-02 23:10:57,508 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-02 23:10:58,133 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-02 23:10:58,548 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-02 23:10:59,361 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-02 23:10:59,694 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-02 23:11:00,650 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-05-02 23:11:01,072 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:11:01,754 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-02 23:11:02,217 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-02 23:11:02,702 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:11:03,572 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-02 23:11:03,871 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-05-02 23:11:04,354 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-02 23:11:04,909 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-02 23:11:05,578 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-02 23:11:06,118 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 23:11:06,490 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-02 23:11:06,834 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:11:07,704 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-02 23:11:08,196 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-05-02 23:11:08,654 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-02 23:11:08,921 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-02 23:11:09,229 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-02 23:11:09,666 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-05-02 23:11:10,018 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-05-02 23:11:10,302 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 10 [2021-05-02 23:11:10,670 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-02 23:11:11,758 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-05-02 23:11:12,197 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-02 23:11:12,669 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-05-02 23:11:13,122 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-05-02 23:11:13,915 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-02 23:11:15,348 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-02 23:11:15,846 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-05-02 23:11:17,045 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-05-02 23:11:17,731 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-02 23:11:18,248 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-05-02 23:11:19,224 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-02 23:11:20,271 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-05-02 23:11:20,470 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-05-02 23:11:20,881 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-02 23:11:21,956 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-02 23:11:22,769 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 23:11:23,576 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-05-02 23:11:24,571 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 23:11:25,104 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-02 23:11:25,686 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-05-02 23:11:25,931 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-02 23:11:26,403 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-02 23:11:26,824 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-02 23:11:27,179 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-02 23:11:27,582 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-02 23:11:27,957 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-02 23:11:29,079 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:11:29,700 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-02 23:11:30,479 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-02 23:11:31,403 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 23:11:32,001 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-02 23:11:33,032 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-02 23:11:33,713 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:11:35,235 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-02 23:11:35,572 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 23:11:35,820 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-02 23:11:36,091 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 23:11:37,427 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-02 23:11:38,135 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-02 23:11:39,610 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-02 23:11:40,145 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-02 23:11:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:41,177 INFO L93 Difference]: Finished difference Result 2587 states and 3174 transitions. [2021-05-02 23:11:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:11:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-05-02 23:11:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:41,189 INFO L225 Difference]: With dead ends: 2587 [2021-05-02 23:11:41,189 INFO L226 Difference]: Without dead ends: 2585 [2021-05-02 23:11:41,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6126 ImplicationChecksByTransitivity, 31756.2ms TimeCoverageRelationStatistics Valid=1872, Invalid=17034, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:11:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-05-02 23:11:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2110. [2021-05-02 23:11:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2014 states have (on average 1.2194637537239326) internal successors, (2456), 2057 states have internal predecessors, (2456), 70 states have call successors, (70), 26 states have call predecessors, (70), 25 states have return successors, (69), 26 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 23:11:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2595 transitions. [2021-05-02 23:11:42,868 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2595 transitions. Word has length 72 [2021-05-02 23:11:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:42,869 INFO L480 AbstractCegarLoop]: Abstraction has 2110 states and 2595 transitions. [2021-05-02 23:11:42,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2595 transitions. [2021-05-02 23:11:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:11:42,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:42,871 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:42,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:11:42,871 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 20 times [2021-05-02 23:11:42,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:42,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929584507] [2021-05-02 23:11:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:42,894 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:42,895 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:43,926 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-05-02 23:11:44,129 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2021-05-02 23:11:44,433 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2021-05-02 23:11:44,689 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 22 [2021-05-02 23:11:45,158 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 23:11:45,405 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:11:45,868 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 23:11:46,119 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-02 23:11:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:11:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:48,232 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 23:11:48,233 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:48,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929584507] [2021-05-02 23:11:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929584507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:48,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:11:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834107736] [2021-05-02 23:11:48,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:11:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:11:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:11:48,234 INFO L87 Difference]: Start difference. First operand 2110 states and 2595 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:11:49,473 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 16 [2021-05-02 23:11:49,822 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2021-05-02 23:11:50,447 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 18 [2021-05-02 23:11:50,765 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 14 [2021-05-02 23:11:51,164 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2021-05-02 23:11:51,661 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 12 [2021-05-02 23:11:52,129 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-05-02 23:11:52,573 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-02 23:11:52,881 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-02 23:11:53,774 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2021-05-02 23:11:54,212 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 23:11:54,823 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 22 [2021-05-02 23:11:55,219 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 23:11:56,242 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:11:56,565 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-02 23:11:57,569 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-02 23:11:58,340 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-02 23:11:59,126 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-05-02 23:11:59,748 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-02 23:12:00,757 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-05-02 23:12:01,540 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-02 23:12:02,636 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2021-05-02 23:12:03,095 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-02 23:12:03,722 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-02 23:12:04,366 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-02 23:12:05,727 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 23:12:06,725 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-05-02 23:12:07,143 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-02 23:12:08,208 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-02 23:12:09,672 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-02 23:12:09,994 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-02 23:12:11,265 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-02 23:12:11,655 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 23:12:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:12,120 INFO L93 Difference]: Finished difference Result 2425 states and 2980 transitions. [2021-05-02 23:12:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:12:12,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-05-02 23:12:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:12,130 INFO L225 Difference]: With dead ends: 2425 [2021-05-02 23:12:12,130 INFO L226 Difference]: Without dead ends: 2423 [2021-05-02 23:12:12,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 17553.6ms TimeCoverageRelationStatistics Valid=793, Invalid=5687, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:12:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-05-02 23:12:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2170. [2021-05-02 23:12:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2069 states have (on average 1.2194296761720638) internal successors, (2523), 2114 states have internal predecessors, (2523), 74 states have call successors, (74), 27 states have call predecessors, (74), 26 states have return successors, (73), 28 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 23:12:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2670 transitions. [2021-05-02 23:12:13,873 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2670 transitions. Word has length 72 [2021-05-02 23:12:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:13,874 INFO L480 AbstractCegarLoop]: Abstraction has 2170 states and 2670 transitions. [2021-05-02 23:12:13,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2670 transitions. [2021-05-02 23:12:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:12:13,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:13,876 INFO L523 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:13,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:12:13,876 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 21 times [2021-05-02 23:12:13,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:13,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261064799] [2021-05-02 23:12:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:13,891 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:13,892 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:14,383 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-02 23:12:14,543 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-02 23:12:14,740 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-02 23:12:14,895 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:12:15,139 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-02 23:12:15,325 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-05-02 23:12:15,543 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-05-02 23:12:15,751 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-05-02 23:12:15,934 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-05-02 23:12:16,169 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-05-02 23:12:16,395 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-05-02 23:12:16,626 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 23:12:16,843 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-02 23:12:17,029 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-02 23:12:18,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:18,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:12:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:18,588 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 23:12:18,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:18,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261064799] [2021-05-02 23:12:18,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [261064799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:18,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:18,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:12:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512713616] [2021-05-02 23:12:18,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:12:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:12:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:12:18,590 INFO L87 Difference]: Start difference. First operand 2170 states and 2670 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:19,282 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-05-02 23:12:20,142 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 23:12:20,498 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 23:12:20,885 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-02 23:12:21,485 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-02 23:12:22,092 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-02 23:12:22,427 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:12:22,727 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-02 23:12:23,262 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-02 23:12:23,741 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 23:12:24,184 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:12:24,495 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-02 23:12:24,807 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-02 23:12:25,277 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-02 23:12:25,635 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-02 23:12:26,024 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-02 23:12:26,661 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-02 23:12:26,934 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:12:27,519 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-02 23:12:27,910 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-02 23:12:28,128 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:12:28,781 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-02 23:12:29,145 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-02 23:12:29,423 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-02 23:12:29,719 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-02 23:12:30,523 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:12:31,004 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-02 23:12:31,280 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-02 23:12:31,714 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-02 23:12:32,017 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-02 23:12:32,500 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-02 23:12:32,971 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-02 23:12:33,277 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 23:12:34,867 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-02 23:12:37,046 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-02 23:12:39,699 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-02 23:12:40,101 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-05-02 23:12:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:40,643 INFO L93 Difference]: Finished difference Result 2387 states and 2926 transitions. [2021-05-02 23:12:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:12:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-05-02 23:12:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:40,654 INFO L225 Difference]: With dead ends: 2387 [2021-05-02 23:12:40,654 INFO L226 Difference]: Without dead ends: 2385 [2021-05-02 23:12:40,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 16621.0ms TimeCoverageRelationStatistics Valid=1049, Invalid=5271, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:12:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-05-02 23:12:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2223. [2021-05-02 23:12:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2119 states have (on average 1.2189712128362435) internal successors, (2583), 2165 states have internal predecessors, (2583), 76 states have call successors, (76), 28 states have call predecessors, (76), 27 states have return successors, (75), 29 states have call predecessors, (75), 75 states have call successors, (75) [2021-05-02 23:12:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2734 transitions. [2021-05-02 23:12:42,479 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2734 transitions. Word has length 72 [2021-05-02 23:12:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:42,479 INFO L480 AbstractCegarLoop]: Abstraction has 2223 states and 2734 transitions. [2021-05-02 23:12:42,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2734 transitions. [2021-05-02 23:12:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:12:42,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:42,482 INFO L523 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:42,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:12:42,482 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 22 times [2021-05-02 23:12:42,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:42,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623419904] [2021-05-02 23:12:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:42,492 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:42,493 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:43,006 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-02 23:12:43,343 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-02 23:12:43,514 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 23:12:43,895 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-05-02 23:12:44,057 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-05-02 23:12:44,294 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-02 23:12:44,498 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-02 23:12:44,695 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-05-02 23:12:44,881 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-05-02 23:12:45,401 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-02 23:12:47,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:47,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 23:12:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:47,342 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 23:12:47,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:47,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623419904] [2021-05-02 23:12:47,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [623419904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:47,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:47,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:12:47,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751182629] [2021-05-02 23:12:47,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:12:47,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:12:47,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:12:47,344 INFO L87 Difference]: Start difference. First operand 2223 states and 2734 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:12:49,066 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-05-02 23:12:49,343 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2021-05-02 23:12:49,769 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 10 [2021-05-02 23:12:50,837 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-05-02 23:12:51,510 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-05-02 23:12:52,142 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-02 23:12:53,219 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 14 [2021-05-02 23:12:53,662 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-02 23:12:54,129 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-02 23:12:54,564 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-02 23:12:55,068 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-02 23:12:55,553 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:12:55,784 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-02 23:12:56,471 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-05-02 23:12:56,974 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:12:58,109 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-05-02 23:12:58,463 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-05-02 23:12:59,276 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-02 23:13:00,317 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-05-02 23:13:00,586 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-02 23:13:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:05,756 INFO L93 Difference]: Finished difference Result 2376 states and 2916 transitions. [2021-05-02 23:13:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:13:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-05-02 23:13:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:05,767 INFO L225 Difference]: With dead ends: 2376 [2021-05-02 23:13:05,767 INFO L226 Difference]: Without dead ends: 2374 [2021-05-02 23:13:05,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 11379.6ms TimeCoverageRelationStatistics Valid=474, Invalid=3816, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:13:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-05-02 23:13:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2258. [2021-05-02 23:13:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2150 states have (on average 1.218139534883721) internal successors, (2619), 2198 states have internal predecessors, (2619), 79 states have call successors, (79), 29 states have call predecessors, (79), 28 states have return successors, (78), 30 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 23:13:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 2776 transitions. [2021-05-02 23:13:07,601 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 2776 transitions. Word has length 72 [2021-05-02 23:13:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:07,601 INFO L480 AbstractCegarLoop]: Abstraction has 2258 states and 2776 transitions. [2021-05-02 23:13:07,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:13:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 2776 transitions. [2021-05-02 23:13:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:13:07,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:07,604 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:07,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:13:07,604 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1383260442, now seen corresponding path program 32 times [2021-05-02 23:13:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:07,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975765829] [2021-05-02 23:13:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:07,615 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:07,616 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:08,970 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-05-02 23:13:10,881 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-02 23:13:11,086 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-02 23:13:11,335 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-02 23:13:11,596 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-02 23:13:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:12,787 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 23:13:12,788 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975765829] [2021-05-02 23:13:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [975765829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:12,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:12,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:13:12,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534703380] [2021-05-02 23:13:12,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:13:12,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:13:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:13:12,789 INFO L87 Difference]: Start difference. First operand 2258 states and 2776 transitions. Second operand has 33 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 23:13:15,827 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:13:17,271 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:13:19,020 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-02 23:13:19,732 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-05-02 23:13:20,342 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-05-02 23:13:20,747 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 23:13:21,745 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-02 23:13:22,404 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-05-02 23:13:22,676 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:13:23,941 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-02 23:13:24,483 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 23:13:24,899 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-02 23:13:26,158 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-05-02 23:13:27,113 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-02 23:13:27,515 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 23:13:28,553 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-05-02 23:13:29,289 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-05-02 23:13:29,627 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-02 23:13:31,033 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-02 23:13:31,490 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-02 23:13:31,859 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-02 23:13:32,838 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 23:13:33,614 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 23:13:34,001 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:13:35,054 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-02 23:13:35,837 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 23:13:36,149 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-02 23:13:36,944 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-02 23:13:37,487 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-02 23:13:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:41,044 INFO L93 Difference]: Finished difference Result 3004 states and 3704 transitions. [2021-05-02 23:13:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:13:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 71 [2021-05-02 23:13:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:41,056 INFO L225 Difference]: With dead ends: 3004 [2021-05-02 23:13:41,056 INFO L226 Difference]: Without dead ends: 3002 [2021-05-02 23:13:41,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 15138.2ms TimeCoverageRelationStatistics Valid=866, Invalid=3964, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:13:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-05-02 23:13:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2302. [2021-05-02 23:13:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2189 states have (on average 1.2169940612151668) internal successors, (2664), 2240 states have internal predecessors, (2664), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (81), 30 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 23:13:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 2827 transitions. [2021-05-02 23:13:43,042 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 2827 transitions. Word has length 71 [2021-05-02 23:13:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:43,042 INFO L480 AbstractCegarLoop]: Abstraction has 2302 states and 2827 transitions. [2021-05-02 23:13:43,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.09375) internal successors, (67), 31 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 23:13:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 2827 transitions. [2021-05-02 23:13:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:13:43,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:43,045 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:43,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:13:43,045 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 25 times [2021-05-02 23:13:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267587803] [2021-05-02 23:13:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:43,068 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:43,069 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:43,711 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-05-02 23:13:44,307 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2021-05-02 23:13:44,638 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-02 23:13:44,911 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-02 23:13:45,148 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-02 23:13:45,361 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-02 23:13:45,651 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-02 23:13:45,881 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-02 23:13:46,187 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-02 23:13:46,450 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-02 23:13:46,730 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-02 23:13:48,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:48,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 23:13:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-05-02 23:13:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:48,600 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 23:13:48,601 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267587803] [2021-05-02 23:13:48,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267587803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:48,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:48,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:13:48,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660187188] [2021-05-02 23:13:48,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:13:48,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:13:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:13:48,602 INFO L87 Difference]: Start difference. First operand 2302 states and 2827 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:13:50,412 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 23:13:50,901 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 23:13:51,169 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:13:51,483 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2021-05-02 23:13:51,870 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-05-02 23:13:52,481 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 23:13:52,798 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-05-02 23:13:53,186 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-02 23:13:53,689 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-02 23:13:54,225 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-02 23:13:55,523 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 23:13:55,910 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:13:56,522 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 23:13:57,399 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-02 23:13:57,898 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 23:13:58,224 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-05-02 23:13:58,693 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-02 23:13:59,554 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 23:14:00,054 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:14:00,368 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-02 23:14:00,682 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 23:14:01,125 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-02 23:14:01,625 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 23:14:02,424 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:14:02,909 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 23:14:04,221 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-02 23:14:04,948 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-02 23:14:05,984 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 23:14:06,770 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-02 23:14:07,260 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 23:14:09,267 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 23:14:10,315 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-02 23:14:10,916 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:14:13,027 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-02 23:14:13,526 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-02 23:14:15,648 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-02 23:14:16,283 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-02 23:14:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:14:17,288 INFO L93 Difference]: Finished difference Result 2629 states and 3222 transitions. [2021-05-02 23:14:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:14:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2021-05-02 23:14:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:14:17,303 INFO L225 Difference]: With dead ends: 2629 [2021-05-02 23:14:17,303 INFO L226 Difference]: Without dead ends: 2627 [2021-05-02 23:14:17,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 18990.7ms TimeCoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:14:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-05-02 23:14:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2451. [2021-05-02 23:14:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2321 states have (on average 1.211977595863852) internal successors, (2813), 2377 states have internal predecessors, (2813), 98 states have call successors, (98), 32 states have call predecessors, (98), 31 states have return successors, (97), 41 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-02 23:14:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 3008 transitions. [2021-05-02 23:14:19,534 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 3008 transitions. Word has length 74 [2021-05-02 23:14:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:14:19,534 INFO L480 AbstractCegarLoop]: Abstraction has 2451 states and 3008 transitions. [2021-05-02 23:14:19,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:14:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 3008 transitions. [2021-05-02 23:14:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:14:19,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:14:19,537 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:14:19,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:14:19,537 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:14:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:14:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 27 times [2021-05-02 23:14:19,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:14:19,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434246377] [2021-05-02 23:14:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:14:19,550 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:19,552 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:14:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:20,566 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-02 23:14:21,123 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-02 23:14:21,417 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-02 23:14:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:14:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:22,163 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 23:14:22,163 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:14:22,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434246377] [2021-05-02 23:14:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434246377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:14:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:14:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:14:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762688376] [2021-05-02 23:14:22,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:14:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:14:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:14:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:14:22,165 INFO L87 Difference]: Start difference. First operand 2451 states and 3008 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 23:14:37,674 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:14:46,572 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:14:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:14:58,167 INFO L93 Difference]: Finished difference Result 3447 states and 4237 transitions. [2021-05-02 23:14:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:14:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 72 [2021-05-02 23:14:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:14:58,182 INFO L225 Difference]: With dead ends: 3447 [2021-05-02 23:14:58,182 INFO L226 Difference]: Without dead ends: 3445 [2021-05-02 23:14:58,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 11611.3ms TimeCoverageRelationStatistics Valid=640, Invalid=8866, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:14:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-05-02 23:15:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2643. [2021-05-02 23:15:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2499 states have (on average 1.2160864345738296) internal successors, (3039), 2565 states have internal predecessors, (3039), 108 states have call successors, (108), 36 states have call predecessors, (108), 35 states have return successors, (107), 41 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-02 23:15:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 3254 transitions. [2021-05-02 23:15:00,703 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 3254 transitions. Word has length 72 [2021-05-02 23:15:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:00,703 INFO L480 AbstractCegarLoop]: Abstraction has 2643 states and 3254 transitions. [2021-05-02 23:15:00,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 23:15:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 3254 transitions. [2021-05-02 23:15:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:15:00,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:00,706 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:00,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:15:00,706 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:00,706 INFO L82 PathProgramCache]: Analyzing trace with hash 867792438, now seen corresponding path program 33 times [2021-05-02 23:15:00,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:00,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049948109] [2021-05-02 23:15:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:00,718 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:00,719 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:01,533 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2021-05-02 23:15:01,769 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-05-02 23:15:02,496 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-02 23:15:02,722 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:15:03,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:03,714 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 23:15:03,714 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:03,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049948109] [2021-05-02 23:15:03,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049948109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:03,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:03,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:15:03,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852664755] [2021-05-02 23:15:03,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:15:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:15:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:15:03,715 INFO L87 Difference]: Start difference. First operand 2643 states and 3254 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 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 23:15:05,268 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-02 23:15:07,224 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2021-05-02 23:15:09,083 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-05-02 23:15:10,445 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-02 23:15:12,097 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 23:15:12,542 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 23:15:12,930 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-02 23:15:13,587 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-02 23:15:14,087 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-02 23:15:14,456 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-02 23:15:15,122 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:15:15,795 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-02 23:15:17,573 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2021-05-02 23:15:17,792 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 23:15:18,359 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-02 23:15:18,692 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-02 23:15:19,160 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 23:15:19,478 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-02 23:15:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:20,713 INFO L93 Difference]: Finished difference Result 2827 states and 3478 transitions. [2021-05-02 23:15:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:15:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 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 72 [2021-05-02 23:15:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:20,725 INFO L225 Difference]: With dead ends: 2827 [2021-05-02 23:15:20,725 INFO L226 Difference]: Without dead ends: 2825 [2021-05-02 23:15:20,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 10043.1ms TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:15:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-05-02 23:15:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2665. [2021-05-02 23:15:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2520 states have (on average 1.2166666666666666) internal successors, (3066), 2586 states have internal predecessors, (3066), 108 states have call successors, (108), 37 states have call predecessors, (108), 36 states have return successors, (107), 41 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-02 23:15:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3281 transitions. [2021-05-02 23:15:23,284 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3281 transitions. Word has length 72 [2021-05-02 23:15:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:23,284 INFO L480 AbstractCegarLoop]: Abstraction has 2665 states and 3281 transitions. [2021-05-02 23:15:23,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 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 23:15:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3281 transitions. [2021-05-02 23:15:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:15:23,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:23,286 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:23,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:15:23,287 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1258025424, now seen corresponding path program 34 times [2021-05-02 23:15:23,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:23,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314613319] [2021-05-02 23:15:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:23,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:23,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:24,639 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2021-05-02 23:15:25,249 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-05-02 23:15:25,627 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-05-02 23:15:26,029 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-05-02 23:15:26,397 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23