/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/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:15,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:15,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:15,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:15,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:15,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:15,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:15,528 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 23:16:15,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:15,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:15,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:15,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:15,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:15,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:15,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:15,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:15,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:15,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:15,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:15,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:15,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:15,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:15,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:15,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:15,547 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:15,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:15,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:15,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:15,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:15,876 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:15,876 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:15,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2021-05-02 23:16:15,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad9cf6/bd19f52c8abc4f3abaf638b6fb60d616/FLAG8ae5791d6 [2021-05-02 23:16:16,256 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:16,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2021-05-02 23:16:16,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad9cf6/bd19f52c8abc4f3abaf638b6fb60d616/FLAG8ae5791d6 [2021-05-02 23:16:16,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad9cf6/bd19f52c8abc4f3abaf638b6fb60d616 [2021-05-02 23:16:16,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:16,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:16,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:16,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:16,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:16,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40379745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16, skipping insertion in model container [2021-05-02 23:16:16,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:16,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:16,808 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2021-05-02 23:16:16,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:16,821 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:16,853 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2021-05-02 23:16:16,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:16,872 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16 WrapperNode [2021-05-02 23:16:16,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:16,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:16,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:16,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:16,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (1/1) ... [2021-05-02 23:16:16,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:16,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:16,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:16,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:16,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (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 23:16:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:16,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:16:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:16:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:16:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:16,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:16,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:17,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:17,238 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:16:17,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:17 BoogieIcfgContainer [2021-05-02 23:16:17,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:17,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:17,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:17,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:17,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:16" (1/3) ... [2021-05-02 23:16:17,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acb9b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:17, skipping insertion in model container [2021-05-02 23:16:17,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:16" (2/3) ... [2021-05-02 23:16:17,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acb9b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:17, skipping insertion in model container [2021-05-02 23:16:17,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:17" (3/3) ... [2021-05-02 23:16:17,250 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2021-05-02 23:16:17,254 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:17,256 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:17,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:17,345 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:17,345 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:17,345 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:17,345 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:17,345 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:17,345 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:17,345 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:17,345 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 23:16:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:17,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,364 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,364 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 1 times [2021-05-02 23:16:17,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758850970] [2021-05-02 23:16:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,440 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758850970] [2021-05-02 23:16:17,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758850970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:17,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931687901] [2021-05-02 23:16:17,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:17,644 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,716 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 23:16:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:17,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 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 14 [2021-05-02 23:16:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,722 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:16:17,722 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:16:17,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:16:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:16:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 23:16:17,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-05-02 23:16:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,753 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 23:16:17,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 23:16:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:17,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,754 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:17,754 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 1 times [2021-05-02 23:16:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771658221] [2021-05-02 23:16:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,757 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,819 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771658221] [2021-05-02 23:16:17,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771658221] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496283347] [2021-05-02 23:16:17,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:17,822 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,894 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 23:16:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 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 14 [2021-05-02 23:16:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,895 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:16:17,895 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:16:17,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:16:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-05-02 23:16:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 23:16:17,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-05-02 23:16:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 23:16:17,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 23:16:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:16:17,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,902 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:17,902 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 1 times [2021-05-02 23:16:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908818871] [2021-05-02 23:16:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,920 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,921 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,968 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908818871] [2021-05-02 23:16:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [908818871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:17,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169476976] [2021-05-02 23:16:17,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:17,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:17,969 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,009 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-05-02 23:16:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:16:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,010 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:16:18,010 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:16:18,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:16:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-05-02 23:16:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 23:16:18,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2021-05-02 23:16:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,015 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 23:16:18,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 23:16:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:16:18,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,016 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:18,016 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 2 times [2021-05-02 23:16:18,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676096550] [2021-05-02 23:16:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,023 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,025 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,097 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676096550] [2021-05-02 23:16:18,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676096550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:18,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789447680] [2021-05-02 23:16:18,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:18,100 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,143 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 23:16:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:16:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,144 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:16:18,144 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:16:18,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:16:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-05-02 23:16:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-02 23:16:18,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2021-05-02 23:16:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,149 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-02 23:16:18,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-02 23:16:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:16:18,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,161 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:18,161 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 3 times [2021-05-02 23:16:18,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972176897] [2021-05-02 23:16:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,168 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,169 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,255 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972176897] [2021-05-02 23:16:18,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972176897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:18,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473169657] [2021-05-02 23:16:18,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:18,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:18,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:18,257 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,306 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 23:16:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:16:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,307 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:16:18,307 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:16:18,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:16:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-05-02 23:16:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-02 23:16:18,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-05-02 23:16:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,325 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-02 23:16:18,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-02 23:16:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:16:18,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,326 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:18,326 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 4 times [2021-05-02 23:16:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386329927] [2021-05-02 23:16:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,332 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,333 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386329927] [2021-05-02 23:16:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [386329927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737892948] [2021-05-02 23:16:18,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:18,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:18,395 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,448 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-05-02 23:16:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:16:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,450 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:16:18,450 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:16:18,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:16:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-05-02 23:16:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 23:16:18,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-05-02 23:16:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,454 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 23:16:18,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 23:16:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:16:18,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,455 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:18,455 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 5 times [2021-05-02 23:16:18,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731760498] [2021-05-02 23:16:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,461 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,531 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731760498] [2021-05-02 23:16:18,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [731760498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:18,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394066572] [2021-05-02 23:16:18,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:18,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:18,533 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,594 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-02 23:16:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 23:16:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,595 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:16:18,596 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:16:18,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:16:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 23:16:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 23:16:18,600 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-05-02 23:16:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,600 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 23:16:18,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 23:16:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:16:18,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,601 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:18,602 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 6 times [2021-05-02 23:16:18,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151747680] [2021-05-02 23:16:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,607 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,608 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,695 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151747680] [2021-05-02 23:16:18,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151747680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226027964] [2021-05-02 23:16:18,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:18,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:18,697 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 23:16:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,786 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-05-02 23:16:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 38 [2021-05-02 23:16:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,787 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:16:18,787 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:16:18,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:16:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 23:16:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 23:16:18,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2021-05-02 23:16:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,792 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 23:16:18,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 23:16:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 23:16:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:18,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,792 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:18,793 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 7 times [2021-05-02 23:16:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637717833] [2021-05-02 23:16:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,799 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,800 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,895 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637717833] [2021-05-02 23:16:18,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [637717833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:18,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752540903] [2021-05-02 23:16:18,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:18,897 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,975 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-05-02 23:16:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:16:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,977 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:16:18,977 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:16:18,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:16:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 23:16:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-02 23:16:18,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-05-02 23:16:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,985 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-02 23:16:18,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-02 23:16:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:18,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,986 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:18,987 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 8 times [2021-05-02 23:16:18,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643435541] [2021-05-02 23:16:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,995 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,996 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,122 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 23:16:19,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643435541] [2021-05-02 23:16:19,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [643435541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246922194] [2021-05-02 23:16:19,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:19,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:19,125 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 23:16:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,205 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-05-02 23:16:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 46 [2021-05-02 23:16:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,206 INFO L225 Difference]: With dead ends: 77 [2021-05-02 23:16:19,206 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:16:19,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:16:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 23:16:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-02 23:16:19,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2021-05-02 23:16:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-02 23:16:19,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 23:16:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-02 23:16:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:19,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,211 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:19,212 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 9 times [2021-05-02 23:16:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340056685] [2021-05-02 23:16:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,217 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,219 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,319 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340056685] [2021-05-02 23:16:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [340056685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:19,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957751650] [2021-05-02 23:16:19,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:19,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:19,321 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,401 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-05-02 23:16:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:16:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,402 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:16:19,402 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:16:19,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:16:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 23:16:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-02 23:16:19,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2021-05-02 23:16:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,410 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-02 23:16:19,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-02 23:16:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:19,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,411 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:19,412 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 10 times [2021-05-02 23:16:19,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413388757] [2021-05-02 23:16:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,418 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,419 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,536 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413388757] [2021-05-02 23:16:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [413388757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:19,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723569506] [2021-05-02 23:16:19,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:19,538 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23:16:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,620 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-05-02 23:16:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 54 [2021-05-02 23:16:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,621 INFO L225 Difference]: With dead ends: 89 [2021-05-02 23:16:19,621 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:16:19,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:16:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-05-02 23:16:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-02 23:16:19,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-05-02 23:16:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,625 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-02 23:16:19,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23:16:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-02 23:16:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:16:19,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,626 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:19,626 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 11 times [2021-05-02 23:16:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618793183] [2021-05-02 23:16:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,631 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,632 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,757 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618793183] [2021-05-02 23:16:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618793183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:19,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007125386] [2021-05-02 23:16:19,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:19,759 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,851 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-05-02 23:16:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 23:16:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,852 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:16:19,852 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:16:19,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:16:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-05-02 23:16:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-02 23:16:19,856 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2021-05-02 23:16:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,856 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-02 23:16:19,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-02 23:16:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:19,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,857 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:19,857 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 12 times [2021-05-02 23:16:19,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196587283] [2021-05-02 23:16:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,862 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,864 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,990 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 23:16:19,990 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196587283] [2021-05-02 23:16:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196587283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:19,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341562674] [2021-05-02 23:16:19,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:19,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:19,992 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,078 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-05-02 23:16:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 62 [2021-05-02 23:16:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,079 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:16:20,079 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:16:20,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:16:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-05-02 23:16:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-02 23:16:20,082 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-05-02 23:16:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,083 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-02 23:16:20,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-02 23:16:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:20,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,083 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:20,084 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 13 times [2021-05-02 23:16:20,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598432866] [2021-05-02 23:16:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,088 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,089 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,252 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598432866] [2021-05-02 23:16:20,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598432866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188077101] [2021-05-02 23:16:20,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:20,254 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,355 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-05-02 23:16:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 66 [2021-05-02 23:16:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,356 INFO L225 Difference]: With dead ends: 107 [2021-05-02 23:16:20,356 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:16:20,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:16:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-05-02 23:16:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:16:20,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2021-05-02 23:16:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,360 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:16:20,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:16:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:20,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,360 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:20,360 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 14 times [2021-05-02 23:16:20,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67084299] [2021-05-02 23:16:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,365 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,366 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,517 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 23:16:20,517 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67084299] [2021-05-02 23:16:20,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [67084299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:20,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594138834] [2021-05-02 23:16:20,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:20,518 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,641 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2021-05-02 23:16:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:20,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 70 [2021-05-02 23:16:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,642 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:16:20,642 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:16:20,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:16:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 23:16:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-02 23:16:20,645 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2021-05-02 23:16:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,646 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-02 23:16:20,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-02 23:16:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:20,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,646 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:20,646 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 15 times [2021-05-02 23:16:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19874697] [2021-05-02 23:16:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,652 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,653 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,928 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19874697] [2021-05-02 23:16:20,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [19874697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187589404] [2021-05-02 23:16:20,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:20,929 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,051 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-05-02 23:16:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,052 INFO L225 Difference]: With dead ends: 119 [2021-05-02 23:16:21,052 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:16:21,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:16:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 23:16:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-02 23:16:21,055 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2021-05-02 23:16:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,056 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-02 23:16:21,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-02 23:16:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:21,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,056 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:21,057 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 16 times [2021-05-02 23:16:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750444735] [2021-05-02 23:16:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,063 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,064 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,251 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750444735] [2021-05-02 23:16:21,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750444735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:21,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808793157] [2021-05-02 23:16:21,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:21,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:21,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:21,253 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 20 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 23:16:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,401 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-05-02 23:16:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 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 78 [2021-05-02 23:16:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,402 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:16:21,402 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:16:21,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:16:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 23:16:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-02 23:16:21,406 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2021-05-02 23:16:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,406 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-02 23:16:21,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 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 23:16:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-02 23:16:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:16:21,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,407 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:21,407 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 17 times [2021-05-02 23:16:21,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591768947] [2021-05-02 23:16:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,412 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,413 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,611 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591768947] [2021-05-02 23:16:21,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [591768947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865086252] [2021-05-02 23:16:21,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:21,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:21,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:21,613 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,736 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-05-02 23:16:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:16:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,737 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:16:21,738 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:16:21,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:16:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-02 23:16:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-02 23:16:21,742 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2021-05-02 23:16:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,742 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-02 23:16:21,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-02 23:16:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:16:21,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,742 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:21,743 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 18 times [2021-05-02 23:16:21,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861301935] [2021-05-02 23:16:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,748 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,749 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,008 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861301935] [2021-05-02 23:16:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861301935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:22,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041724798] [2021-05-02 23:16:22,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:22,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:22,010 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,178 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2021-05-02 23:16:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 86 [2021-05-02 23:16:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,179 INFO L225 Difference]: With dead ends: 137 [2021-05-02 23:16:22,179 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:16:22,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:16:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-05-02 23:16:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-02 23:16:22,183 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2021-05-02 23:16:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,184 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-02 23:16:22,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-02 23:16:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:16:22,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,184 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:22,185 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 19 times [2021-05-02 23:16:22,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490641646] [2021-05-02 23:16:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,190 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,432 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490641646] [2021-05-02 23:16:22,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [490641646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:22,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581742086] [2021-05-02 23:16:22,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:22,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:22,433 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,618 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-05-02 23:16:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 90 [2021-05-02 23:16:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,629 INFO L225 Difference]: With dead ends: 143 [2021-05-02 23:16:22,629 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:16:22,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:16:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 23:16:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-02 23:16:22,632 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2021-05-02 23:16:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,633 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-02 23:16:22,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-02 23:16:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:16:22,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,633 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:22,633 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 20 times [2021-05-02 23:16:22,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914452937] [2021-05-02 23:16:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,647 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,648 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,886 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914452937] [2021-05-02 23:16:22,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [914452937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:22,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715542013] [2021-05-02 23:16:22,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:22,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:22,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:22,888 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 23:16:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,036 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2021-05-02 23:16:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 94 [2021-05-02 23:16:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,039 INFO L225 Difference]: With dead ends: 149 [2021-05-02 23:16:23,039 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:16:23,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:16:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-05-02 23:16:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-02 23:16:23,043 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2021-05-02 23:16:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,043 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-02 23:16:23,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 23:16:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-02 23:16:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:16:23,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,043 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:23,044 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 21 times [2021-05-02 23:16:23,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608589623] [2021-05-02 23:16:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,048 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,049 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:23,347 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608589623] [2021-05-02 23:16:23,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [608589623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883184546] [2021-05-02 23:16:23,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:23,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:23,349 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 23:16:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,500 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-05-02 23:16:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 98 [2021-05-02 23:16:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,501 INFO L225 Difference]: With dead ends: 155 [2021-05-02 23:16:23,501 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:16:23,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:16:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 23:16:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-02 23:16:23,505 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2021-05-02 23:16:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,505 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-02 23:16:23,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 23:16:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-02 23:16:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:23,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,506 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:23,506 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 22 times [2021-05-02 23:16:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806121095] [2021-05-02 23:16:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,510 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,511 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:23,818 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806121095] [2021-05-02 23:16:23,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806121095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:23,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7866297] [2021-05-02 23:16:23,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:23,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:23,819 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,003 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-05-02 23:16:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 102 [2021-05-02 23:16:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,004 INFO L225 Difference]: With dead ends: 161 [2021-05-02 23:16:24,004 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:16:24,004 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:16:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-05-02 23:16:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-02 23:16:24,008 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2021-05-02 23:16:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,008 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-02 23:16:24,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-02 23:16:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:16:24,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,009 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:24,009 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 23 times [2021-05-02 23:16:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001174690] [2021-05-02 23:16:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,014 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,015 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001174690] [2021-05-02 23:16:24,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001174690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060204912] [2021-05-02 23:16:24,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:24,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:24,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:24,328 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,496 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-05-02 23:16:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 23:16:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,497 INFO L225 Difference]: With dead ends: 167 [2021-05-02 23:16:24,497 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 23:16:24,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 23:16:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-02 23:16:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-02 23:16:24,502 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-05-02 23:16:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,502 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-02 23:16:24,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-02 23:16:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:16:24,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,503 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:24,503 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 24 times [2021-05-02 23:16:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921484378] [2021-05-02 23:16:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,521 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,883 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921484378] [2021-05-02 23:16:24,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [921484378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:24,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360695014] [2021-05-02 23:16:24,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:24,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:24,885 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 23:16:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:25,068 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2021-05-02 23:16:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 110 [2021-05-02 23:16:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:25,069 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:16:25,069 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:16:25,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:16:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-05-02 23:16:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-05-02 23:16:25,072 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2021-05-02 23:16:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,073 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-05-02 23:16:25,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 23:16:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-05-02 23:16:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:16:25,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,073 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:25,074 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 25 times [2021-05-02 23:16:25,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462887683] [2021-05-02 23:16:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,078 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,079 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,446 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462887683] [2021-05-02 23:16:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462887683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320128557] [2021-05-02 23:16:25,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:25,448 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 23:16:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:25,666 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2021-05-02 23:16:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 114 [2021-05-02 23:16:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:25,667 INFO L225 Difference]: With dead ends: 179 [2021-05-02 23:16:25,667 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:16:25,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:16:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-02 23:16:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-05-02 23:16:25,670 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2021-05-02 23:16:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,671 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-05-02 23:16:25,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 23:16:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-05-02 23:16:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:16:25,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,671 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:25,672 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 26 times [2021-05-02 23:16:25,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272065204] [2021-05-02 23:16:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,677 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,678 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:26,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272065204] [2021-05-02 23:16:26,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [272065204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596830629] [2021-05-02 23:16:26,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:26,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:26,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:26,096 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,314 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2021-05-02 23:16:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 23:16:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,318 INFO L225 Difference]: With dead ends: 185 [2021-05-02 23:16:26,318 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 23:16:26,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 23:16:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 23:16:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-05-02 23:16:26,324 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2021-05-02 23:16:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,324 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-05-02 23:16:26,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-05-02 23:16:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:16:26,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,325 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:26,325 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 27 times [2021-05-02 23:16:26,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212002580] [2021-05-02 23:16:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,332 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,333 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:26,809 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212002580] [2021-05-02 23:16:26,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [212002580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:26,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426335700] [2021-05-02 23:16:26,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:26,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:26,811 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,142 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-05-02 23:16:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 23:16:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,143 INFO L225 Difference]: With dead ends: 191 [2021-05-02 23:16:27,143 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:16:27,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:16:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-05-02 23:16:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-05-02 23:16:27,147 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2021-05-02 23:16:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,148 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-05-02 23:16:27,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-05-02 23:16:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:16:27,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,149 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:27,149 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,149 INFO L82 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 28 times [2021-05-02 23:16:27,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573191851] [2021-05-02 23:16:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,171 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,172 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:27,641 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:27,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573191851] [2021-05-02 23:16:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573191851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:27,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318891589] [2021-05-02 23:16:27,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:27,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:27,643 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,840 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2021-05-02 23:16:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 23:16:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,841 INFO L225 Difference]: With dead ends: 197 [2021-05-02 23:16:27,841 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:16:27,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:16:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-05-02 23:16:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-05-02 23:16:27,845 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2021-05-02 23:16:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,846 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-05-02 23:16:27,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-05-02 23:16:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:16:27,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,846 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:27,847 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 29 times [2021-05-02 23:16:27,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951437382] [2021-05-02 23:16:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,852 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,854 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,289 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951437382] [2021-05-02 23:16:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951437382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169929571] [2021-05-02 23:16:28,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:28,291 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:28,514 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-05-02 23:16:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 23:16:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:28,515 INFO L225 Difference]: With dead ends: 203 [2021-05-02 23:16:28,515 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:16:28,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:16:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-05-02 23:16:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-05-02 23:16:28,519 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-05-02 23:16:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:28,519 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-05-02 23:16:28,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-05-02 23:16:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:16:28,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:28,520 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:28,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:28,520 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 30 times [2021-05-02 23:16:28,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116644357] [2021-05-02 23:16:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:28,525 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:28,526 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,953 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116644357] [2021-05-02 23:16:28,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [116644357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:28,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823880337] [2021-05-02 23:16:28,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:28,955 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,176 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-05-02 23:16:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 23:16:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,177 INFO L225 Difference]: With dead ends: 209 [2021-05-02 23:16:29,177 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:16:29,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:16:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-05-02 23:16:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-05-02 23:16:29,182 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2021-05-02 23:16:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,182 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-05-02 23:16:29,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-05-02 23:16:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:16:29,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,183 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:29,183 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1866617360, now seen corresponding path program 31 times [2021-05-02 23:16:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651170098] [2021-05-02 23:16:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,188 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,189 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:29,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651170098] [2021-05-02 23:16:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651170098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:29,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:29,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:29,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877766648] [2021-05-02 23:16:29,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:29,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:29,645 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,873 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-05-02 23:16:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 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 138 [2021-05-02 23:16:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,875 INFO L225 Difference]: With dead ends: 215 [2021-05-02 23:16:29,875 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:16:29,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:16:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-05-02 23:16:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-05-02 23:16:29,882 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2021-05-02 23:16:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,882 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-05-02 23:16:29,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-05-02 23:16:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:16:29,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,883 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:29,883 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash -819864300, now seen corresponding path program 32 times [2021-05-02 23:16:29,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115715483] [2021-05-02 23:16:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,891 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,892 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,410 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 23:16:30,410 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115715483] [2021-05-02 23:16:30,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115715483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780623377] [2021-05-02 23:16:30,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:30,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:30,412 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,613 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2021-05-02 23:16:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 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 142 [2021-05-02 23:16:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,614 INFO L225 Difference]: With dead ends: 221 [2021-05-02 23:16:30,614 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:16:30,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:16:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 23:16:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-05-02 23:16:30,619 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2021-05-02 23:16:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,619 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-05-02 23:16:30,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-05-02 23:16:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:16:30,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,620 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:30,620 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 35214872, now seen corresponding path program 33 times [2021-05-02 23:16:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374207797] [2021-05-02 23:16:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,626 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,627 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,146 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 23:16:31,146 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374207797] [2021-05-02 23:16:31,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [374207797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709078931] [2021-05-02 23:16:31,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:31,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:31,147 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,372 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-05-02 23:16:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 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 146 [2021-05-02 23:16:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,374 INFO L225 Difference]: With dead ends: 227 [2021-05-02 23:16:31,374 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:16:31,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:16:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2021-05-02 23:16:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-05-02 23:16:31,379 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2021-05-02 23:16:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,379 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-05-02 23:16:31,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-05-02 23:16:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:16:31,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,380 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:31,380 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1266531612, now seen corresponding path program 34 times [2021-05-02 23:16:31,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102795161] [2021-05-02 23:16:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,386 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,387 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,947 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102795161] [2021-05-02 23:16:31,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102795161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498211478] [2021-05-02 23:16:31,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:31,949 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,240 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-05-02 23:16:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 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 150 [2021-05-02 23:16:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,241 INFO L225 Difference]: With dead ends: 233 [2021-05-02 23:16:32,241 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:16:32,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:16:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-05-02 23:16:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-05-02 23:16:32,245 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2021-05-02 23:16:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,246 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-05-02 23:16:32,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-05-02 23:16:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:16:32,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,246 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:32,247 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash -316403168, now seen corresponding path program 35 times [2021-05-02 23:16:32,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526320532] [2021-05-02 23:16:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,252 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,252 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526320532] [2021-05-02 23:16:32,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [526320532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824339800] [2021-05-02 23:16:32,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:32,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:32,835 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,103 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-05-02 23:16:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 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 154 [2021-05-02 23:16:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,104 INFO L225 Difference]: With dead ends: 239 [2021-05-02 23:16:33,104 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:16:33,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:16:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-02 23:16:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-05-02 23:16:33,108 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2021-05-02 23:16:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,108 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-05-02 23:16:33,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-05-02 23:16:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:16:33,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,109 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:33,109 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1486793436, now seen corresponding path program 36 times [2021-05-02 23:16:33,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916474957] [2021-05-02 23:16:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,114 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,115 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,738 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916474957] [2021-05-02 23:16:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916474957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191376870] [2021-05-02 23:16:33,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:33,739 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,044 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2021-05-02 23:16:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 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 158 [2021-05-02 23:16:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,045 INFO L225 Difference]: With dead ends: 245 [2021-05-02 23:16:34,046 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:16:34,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:16:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2021-05-02 23:16:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-05-02 23:16:34,051 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2021-05-02 23:16:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,051 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-05-02 23:16:34,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-05-02 23:16:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:16:34,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,052 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:34,052 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash 956991016, now seen corresponding path program 37 times [2021-05-02 23:16:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011457273] [2021-05-02 23:16:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,058 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,059 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,747 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011457273] [2021-05-02 23:16:34,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011457273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104207998] [2021-05-02 23:16:34,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:34,748 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,979 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2021-05-02 23:16:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 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 162 [2021-05-02 23:16:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,980 INFO L225 Difference]: With dead ends: 251 [2021-05-02 23:16:34,980 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:16:34,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:16:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 23:16:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-05-02 23:16:34,984 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2021-05-02 23:16:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,984 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-05-02 23:16:34,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-05-02 23:16:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:16:34,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,985 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:34,985 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash -546003668, now seen corresponding path program 38 times [2021-05-02 23:16:34,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895909018] [2021-05-02 23:16:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,990 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,991 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895909018] [2021-05-02 23:16:35,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895909018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159832294] [2021-05-02 23:16:35,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:35,828 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,265 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2021-05-02 23:16:36,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:36,266 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 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 166 [2021-05-02 23:16:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,267 INFO L225 Difference]: With dead ends: 257 [2021-05-02 23:16:36,267 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:16:36,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:16:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-05-02 23:16:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-05-02 23:16:36,274 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2021-05-02 23:16:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,275 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-05-02 23:16:36,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-05-02 23:16:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:16:36,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,276 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:36,276 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -696995280, now seen corresponding path program 39 times [2021-05-02 23:16:36,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668670068] [2021-05-02 23:16:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,283 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,141 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668670068] [2021-05-02 23:16:37,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668670068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:37,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689111124] [2021-05-02 23:16:37,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:37,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:37,143 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,450 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-05-02 23:16:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-02 23:16:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,451 INFO L225 Difference]: With dead ends: 263 [2021-05-02 23:16:37,451 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:16:37,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 737.8ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:16:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-05-02 23:16:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-05-02 23:16:37,455 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2021-05-02 23:16:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,455 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-05-02 23:16:37,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-05-02 23:16:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 23:16:37,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,456 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:37,456 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,456 INFO L82 PathProgramCache]: Analyzing trace with hash -664818380, now seen corresponding path program 40 times [2021-05-02 23:16:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927865882] [2021-05-02 23:16:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,461 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:38,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927865882] [2021-05-02 23:16:38,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [927865882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:38,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111211168] [2021-05-02 23:16:38,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:38,274 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,535 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2021-05-02 23:16:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 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 174 [2021-05-02 23:16:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,536 INFO L225 Difference]: With dead ends: 269 [2021-05-02 23:16:38,536 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:16:38,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 724.8ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:16:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-05-02 23:16:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-05-02 23:16:38,541 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2021-05-02 23:16:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,541 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-05-02 23:16:38,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-05-02 23:16:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 23:16:38,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,541 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:38,542 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1643473352, now seen corresponding path program 41 times [2021-05-02 23:16:38,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498060723] [2021-05-02 23:16:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,546 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,547 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:39,361 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498060723] [2021-05-02 23:16:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [498060723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:39,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599794130] [2021-05-02 23:16:39,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:39,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:39,362 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,617 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2021-05-02 23:16:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 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 178 [2021-05-02 23:16:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,618 INFO L225 Difference]: With dead ends: 275 [2021-05-02 23:16:39,618 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:16:39,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:16:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 23:16:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-05-02 23:16:39,623 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2021-05-02 23:16:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,623 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-05-02 23:16:39,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,623 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-05-02 23:16:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 23:16:39,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,624 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:39,624 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1590324540, now seen corresponding path program 42 times [2021-05-02 23:16:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815252681] [2021-05-02 23:16:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,633 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,634 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,480 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 23:16:40,480 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815252681] [2021-05-02 23:16:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815252681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:40,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789073429] [2021-05-02 23:16:40,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:40,482 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,747 INFO L93 Difference]: Finished difference Result 281 states and 284 transitions. [2021-05-02 23:16:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 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 182 [2021-05-02 23:16:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,748 INFO L225 Difference]: With dead ends: 281 [2021-05-02 23:16:40,748 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:16:40,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 781.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:16:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-02 23:16:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-05-02 23:16:40,753 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2021-05-02 23:16:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,753 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-05-02 23:16:40,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-05-02 23:16:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 23:16:40,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,754 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:40,754 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1349792320, now seen corresponding path program 43 times [2021-05-02 23:16:40,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047546104] [2021-05-02 23:16:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,759 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,759 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,673 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 23:16:41,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047546104] [2021-05-02 23:16:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047546104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472663915] [2021-05-02 23:16:41,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:41,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:41,675 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,984 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2021-05-02 23:16:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 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 186 [2021-05-02 23:16:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,986 INFO L225 Difference]: With dead ends: 287 [2021-05-02 23:16:41,986 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:16:41,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:16:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-05-02 23:16:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-05-02 23:16:41,990 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2021-05-02 23:16:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,990 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-05-02 23:16:41,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-05-02 23:16:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:16:41,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,991 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:41,991 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash 660399428, now seen corresponding path program 44 times [2021-05-02 23:16:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366474425] [2021-05-02 23:16:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,000 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,001 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:42,946 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366474425] [2021-05-02 23:16:42,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [366474425] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099748217] [2021-05-02 23:16:42,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:42,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:42,948 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,235 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2021-05-02 23:16:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 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 190 [2021-05-02 23:16:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,236 INFO L225 Difference]: With dead ends: 293 [2021-05-02 23:16:43,236 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 23:16:43,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 23:16:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-05-02 23:16:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2021-05-02 23:16:43,240 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2021-05-02 23:16:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,240 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2021-05-02 23:16:43,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2021-05-02 23:16:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 23:16:43,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,241 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:43,241 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1772517816, now seen corresponding path program 45 times [2021-05-02 23:16:43,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387439699] [2021-05-02 23:16:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,252 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,253 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:44,266 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:44,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387439699] [2021-05-02 23:16:44,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387439699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:44,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:44,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:44,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542958660] [2021-05-02 23:16:44,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:44,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:44,267 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,557 INFO L93 Difference]: Finished difference Result 299 states and 302 transitions. [2021-05-02 23:16:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 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 194 [2021-05-02 23:16:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,558 INFO L225 Difference]: With dead ends: 299 [2021-05-02 23:16:44,558 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 23:16:44,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 23:16:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2021-05-02 23:16:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2021-05-02 23:16:44,564 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2021-05-02 23:16:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,564 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2021-05-02 23:16:44,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2021-05-02 23:16:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 23:16:44,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,565 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:44,565 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -826337972, now seen corresponding path program 46 times [2021-05-02 23:16:44,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822178958] [2021-05-02 23:16:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,574 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:45,597 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822178958] [2021-05-02 23:16:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822178958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869943455] [2021-05-02 23:16:45,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:45,599 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,989 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2021-05-02 23:16:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 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 198 [2021-05-02 23:16:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,991 INFO L225 Difference]: With dead ends: 305 [2021-05-02 23:16:45,991 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 23:16:45,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 23:16:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-05-02 23:16:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2021-05-02 23:16:45,995 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2021-05-02 23:16:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,995 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2021-05-02 23:16:45,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2021-05-02 23:16:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 23:16:45,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,996 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:45,996 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 6459984, now seen corresponding path program 47 times [2021-05-02 23:16:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372450644] [2021-05-02 23:16:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:46,001 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:46,002 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,064 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 23:16:47,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:47,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372450644] [2021-05-02 23:16:47,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [372450644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:47,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:47,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:47,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980134348] [2021-05-02 23:16:47,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:47,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:47,065 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,436 INFO L93 Difference]: Finished difference Result 311 states and 314 transitions. [2021-05-02 23:16:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 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 202 [2021-05-02 23:16:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,437 INFO L225 Difference]: With dead ends: 311 [2021-05-02 23:16:47,437 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 23:16:47,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 23:16:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-05-02 23:16:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-05-02 23:16:47,441 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2021-05-02 23:16:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,441 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-05-02 23:16:47,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-05-02 23:16:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 23:16:47,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,442 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:47,442 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -644285100, now seen corresponding path program 48 times [2021-05-02 23:16:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458781733] [2021-05-02 23:16:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,447 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,448 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:48,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458781733] [2021-05-02 23:16:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [458781733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:16:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050275556] [2021-05-02 23:16:48,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:16:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:16:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:48,581 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,918 INFO L93 Difference]: Finished difference Result 317 states and 320 transitions. [2021-05-02 23:16:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:16:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 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 206 [2021-05-02 23:16:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,920 INFO L225 Difference]: With dead ends: 317 [2021-05-02 23:16:48,920 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 23:16:48,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1054.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 23:16:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2021-05-02 23:16:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2021-05-02 23:16:48,924 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2021-05-02 23:16:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,924 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2021-05-02 23:16:48,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2021-05-02 23:16:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:16:48,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,925 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:48,925 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 121067096, now seen corresponding path program 49 times [2021-05-02 23:16:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140628689] [2021-05-02 23:16:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,929 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:50,061 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:50,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140628689] [2021-05-02 23:16:50,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [140628689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:50,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:50,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:16:50,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325400281] [2021-05-02 23:16:50,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:16:50,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:50,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:16:50,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:50,062 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,456 INFO L93 Difference]: Finished difference Result 323 states and 326 transitions. [2021-05-02 23:16:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:16:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 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 210 [2021-05-02 23:16:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,458 INFO L225 Difference]: With dead ends: 323 [2021-05-02 23:16:50,458 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 23:16:50,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1055.0ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 23:16:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-05-02 23:16:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-05-02 23:16:50,464 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2021-05-02 23:16:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:50,464 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-05-02 23:16:50,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-05-02 23:16:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 23:16:50,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:50,466 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:50,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:50,466 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1265459876, now seen corresponding path program 50 times [2021-05-02 23:16:50,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:50,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791976038] [2021-05-02 23:16:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:50,472 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:50,473 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,681 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791976038] [2021-05-02 23:16:51,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791976038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:16:51,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169806658] [2021-05-02 23:16:51,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:16:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:16:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:51,683 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:52,097 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2021-05-02 23:16:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:16:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 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 214 [2021-05-02 23:16:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:52,099 INFO L225 Difference]: With dead ends: 329 [2021-05-02 23:16:52,099 INFO L226 Difference]: Without dead ends: 221 [2021-05-02 23:16:52,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1116.5ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:52,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-02 23:16:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2021-05-02 23:16:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-05-02 23:16:52,102 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2021-05-02 23:16:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:52,103 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-05-02 23:16:52,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-05-02 23:16:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:16:52,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:52,103 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:52,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:16:52,104 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash 192926304, now seen corresponding path program 51 times [2021-05-02 23:16:52,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:52,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363777823] [2021-05-02 23:16:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:52,108 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:52,108 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:53,338 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:53,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363777823] [2021-05-02 23:16:53,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363777823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:53,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:53,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:16:53,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665577230] [2021-05-02 23:16:53,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:16:53,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:16:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:53,340 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:53,756 INFO L93 Difference]: Finished difference Result 335 states and 338 transitions. [2021-05-02 23:16:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:16:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 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 218 [2021-05-02 23:16:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:53,757 INFO L225 Difference]: With dead ends: 335 [2021-05-02 23:16:53,757 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 23:16:53,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1153.9ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 23:16:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2021-05-02 23:16:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2021-05-02 23:16:53,762 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2021-05-02 23:16:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:53,762 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2021-05-02 23:16:53,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2021-05-02 23:16:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 23:16:53,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:53,763 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:53,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:16:53,763 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1269566108, now seen corresponding path program 52 times [2021-05-02 23:16:53,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:53,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855733819] [2021-05-02 23:16:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:53,768 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:53,769 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:55,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:55,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:55,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855733819] [2021-05-02 23:16:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [855733819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:55,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:55,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:16:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232651138] [2021-05-02 23:16:55,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:16:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:16:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:55,082 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:55,434 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2021-05-02 23:16:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:16:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 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 222 [2021-05-02 23:16:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:55,435 INFO L225 Difference]: With dead ends: 341 [2021-05-02 23:16:55,435 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 23:16:55,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1222.2ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 23:16:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-05-02 23:16:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2021-05-02 23:16:55,439 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2021-05-02 23:16:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:55,439 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2021-05-02 23:16:55,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2021-05-02 23:16:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 23:16:55,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:55,440 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:55,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:16:55,440 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1441007208, now seen corresponding path program 53 times [2021-05-02 23:16:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:55,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640506381] [2021-05-02 23:16:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:55,445 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:55,446 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:56,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640506381] [2021-05-02 23:16:56,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [640506381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:16:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592519203] [2021-05-02 23:16:56,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:16:56,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:16:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:56,806 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:57,227 INFO L93 Difference]: Finished difference Result 347 states and 350 transitions. [2021-05-02 23:16:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 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 226 [2021-05-02 23:16:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:57,229 INFO L225 Difference]: With dead ends: 347 [2021-05-02 23:16:57,229 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 23:16:57,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 23:16:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-05-02 23:16:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2021-05-02 23:16:57,233 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2021-05-02 23:16:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:57,233 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2021-05-02 23:16:57,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2021-05-02 23:16:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:16:57,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:57,234 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:57,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:16:57,234 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash 361039212, now seen corresponding path program 54 times [2021-05-02 23:16:57,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:57,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480762663] [2021-05-02 23:16:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:57,239 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:57,239 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:58,633 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:58,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480762663] [2021-05-02 23:16:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480762663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:58,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:16:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950722869] [2021-05-02 23:16:58,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:16:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:16:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:58,634 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:59,099 INFO L93 Difference]: Finished difference Result 353 states and 356 transitions. [2021-05-02 23:16:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:16:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 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 230 [2021-05-02 23:16:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:59,101 INFO L225 Difference]: With dead ends: 353 [2021-05-02 23:16:59,101 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 23:16:59,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1311.3ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:59,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 23:16:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2021-05-02 23:16:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-05-02 23:16:59,105 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2021-05-02 23:16:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,105 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-05-02 23:16:59,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-05-02 23:16:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 23:16:59,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,106 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:16:59,106 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 386658928, now seen corresponding path program 55 times [2021-05-02 23:16:59,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71682456] [2021-05-02 23:16:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,111 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,111 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:00,301 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:00,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71682456] [2021-05-02 23:17:00,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [71682456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:00,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:00,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:17:00,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591028467] [2021-05-02 23:17:00,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:17:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:17:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:00,317 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,816 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2021-05-02 23:17:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:17:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 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 234 [2021-05-02 23:17:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:00,817 INFO L225 Difference]: With dead ends: 359 [2021-05-02 23:17:00,817 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 23:17:00,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1109.3ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 23:17:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-02 23:17:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2021-05-02 23:17:00,822 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2021-05-02 23:17:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:00,822 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2021-05-02 23:17:00,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2021-05-02 23:17:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 23:17:00,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:00,823 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:00,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:17:00,823 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash -53621388, now seen corresponding path program 56 times [2021-05-02 23:17:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:00,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257120185] [2021-05-02 23:17:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:00,828 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:00,829 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:02,155 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257120185] [2021-05-02 23:17:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [257120185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:02,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:02,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:17:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566324549] [2021-05-02 23:17:02,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:17:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:02,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:17:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:02,156 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:02,576 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2021-05-02 23:17:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:17:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 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 238 [2021-05-02 23:17:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:02,578 INFO L225 Difference]: With dead ends: 365 [2021-05-02 23:17:02,578 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 23:17:02,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1240.5ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 23:17:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-05-02 23:17:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2021-05-02 23:17:02,599 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2021-05-02 23:17:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:02,599 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2021-05-02 23:17:02,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2021-05-02 23:17:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 23:17:02,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:02,617 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:02,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:17:02,617 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1738511992, now seen corresponding path program 57 times [2021-05-02 23:17:02,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:02,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760030759] [2021-05-02 23:17:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:02,622 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:02,623 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:04,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:04,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760030759] [2021-05-02 23:17:04,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760030759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:04,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:04,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:17:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241457607] [2021-05-02 23:17:04,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:17:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:17:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:04,258 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:04,702 INFO L93 Difference]: Finished difference Result 371 states and 374 transitions. [2021-05-02 23:17:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:17:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 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 242 [2021-05-02 23:17:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:04,703 INFO L225 Difference]: With dead ends: 371 [2021-05-02 23:17:04,703 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 23:17:04,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1473.5ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 23:17:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 23:17:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2021-05-02 23:17:04,707 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2021-05-02 23:17:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:04,707 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2021-05-02 23:17:04,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2021-05-02 23:17:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:17:04,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:04,708 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:04,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:17:04,708 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1993756028, now seen corresponding path program 58 times [2021-05-02 23:17:04,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:04,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116006823] [2021-05-02 23:17:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:04,712 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:04,713 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116006823] [2021-05-02 23:17:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116006823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:17:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830537246] [2021-05-02 23:17:06,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:17:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:17:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:06,383 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,936 INFO L93 Difference]: Finished difference Result 377 states and 380 transitions. [2021-05-02 23:17:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:17:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 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 246 [2021-05-02 23:17:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,937 INFO L225 Difference]: With dead ends: 377 [2021-05-02 23:17:06,937 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 23:17:06,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1583.5ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 23:17:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-05-02 23:17:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2021-05-02 23:17:06,941 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2021-05-02 23:17:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,941 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2021-05-02 23:17:06,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2021-05-02 23:17:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:17:06,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,942 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:17:06,943 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1212609152, now seen corresponding path program 59 times [2021-05-02 23:17:06,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105351015] [2021-05-02 23:17:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,947 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:06,948 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,631 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 23:17:08,631 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105351015] [2021-05-02 23:17:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [105351015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:17:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76022348] [2021-05-02 23:17:08,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:17:08,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:17:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:08,632 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:09,143 INFO L93 Difference]: Finished difference Result 383 states and 386 transitions. [2021-05-02 23:17:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:17:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 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 250 [2021-05-02 23:17:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:09,144 INFO L225 Difference]: With dead ends: 383 [2021-05-02 23:17:09,145 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 23:17:09,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 23:17:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2021-05-02 23:17:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2021-05-02 23:17:09,148 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2021-05-02 23:17:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:09,148 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2021-05-02 23:17:09,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2021-05-02 23:17:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-02 23:17:09,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:09,149 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:09,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:17:09,149 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2017887620, now seen corresponding path program 60 times [2021-05-02 23:17:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:09,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426617566] [2021-05-02 23:17:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:09,154 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:09,154 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:10,865 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426617566] [2021-05-02 23:17:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [426617566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918268792] [2021-05-02 23:17:10,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:10,866 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,331 INFO L93 Difference]: Finished difference Result 389 states and 392 transitions. [2021-05-02 23:17:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 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 254 [2021-05-02 23:17:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,333 INFO L225 Difference]: With dead ends: 389 [2021-05-02 23:17:11,333 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 23:17:11,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1627.6ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 23:17:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2021-05-02 23:17:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2021-05-02 23:17:11,337 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2021-05-02 23:17:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,337 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2021-05-02 23:17:11,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2021-05-02 23:17:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 23:17:11,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,339 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:17:11,339 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1582692728, now seen corresponding path program 61 times [2021-05-02 23:17:11,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046882709] [2021-05-02 23:17:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:13,120 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:13,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046882709] [2021-05-02 23:17:13,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046882709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:13,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:13,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:13,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114227173] [2021-05-02 23:17:13,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:13,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:13,121 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,661 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2021-05-02 23:17:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 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 258 [2021-05-02 23:17:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,662 INFO L225 Difference]: With dead ends: 395 [2021-05-02 23:17:13,662 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 23:17:13,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1683.4ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 23:17:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2021-05-02 23:17:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2021-05-02 23:17:13,667 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2021-05-02 23:17:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:13,667 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2021-05-02 23:17:13,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2021-05-02 23:17:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-02 23:17:13,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:13,668 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:13,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:13,668 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash -574196340, now seen corresponding path program 62 times [2021-05-02 23:17:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120830924] [2021-05-02 23:17:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:13,673 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:13,673 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:15,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120830924] [2021-05-02 23:17:15,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120830924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:15,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066414493] [2021-05-02 23:17:15,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:15,510 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:16,069 INFO L93 Difference]: Finished difference Result 401 states and 404 transitions. [2021-05-02 23:17:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 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 262 [2021-05-02 23:17:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:16,070 INFO L225 Difference]: With dead ends: 401 [2021-05-02 23:17:16,070 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 23:17:16,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1727.4ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 23:17:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2021-05-02 23:17:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2021-05-02 23:17:16,074 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2021-05-02 23:17:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:16,074 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2021-05-02 23:17:16,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2021-05-02 23:17:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 23:17:16,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:16,075 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:16,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:16,076 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1148244624, now seen corresponding path program 63 times [2021-05-02 23:17:16,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:16,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868696205] [2021-05-02 23:17:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:16,080 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:16,081 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,984 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 23:17:17,984 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868696205] [2021-05-02 23:17:17,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868696205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220730307] [2021-05-02 23:17:17,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:17,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:17,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:17,986 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:18,539 INFO L93 Difference]: Finished difference Result 407 states and 410 transitions. [2021-05-02 23:17:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 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 266 [2021-05-02 23:17:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:18,541 INFO L225 Difference]: With dead ends: 407 [2021-05-02 23:17:18,541 INFO L226 Difference]: Without dead ends: 273 [2021-05-02 23:17:18,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1808.9ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-02 23:17:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2021-05-02 23:17:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2021-05-02 23:17:18,545 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2021-05-02 23:17:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:18,545 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2021-05-02 23:17:18,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2021-05-02 23:17:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:17:18,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:18,546 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:18,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:18,546 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1811815828, now seen corresponding path program 64 times [2021-05-02 23:17:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:18,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146609257] [2021-05-02 23:17:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:18,550 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:18,551 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:20,504 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:20,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146609257] [2021-05-02 23:17:20,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146609257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:20,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:20,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860867827] [2021-05-02 23:17:20,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:20,506 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:21,114 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2021-05-02 23:17:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 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 270 [2021-05-02 23:17:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:21,115 INFO L225 Difference]: With dead ends: 413 [2021-05-02 23:17:21,115 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 23:17:21,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1866.5ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 23:17:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2021-05-02 23:17:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-05-02 23:17:21,135 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2021-05-02 23:17:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:21,135 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-05-02 23:17:21,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-05-02 23:17:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:17:21,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:21,136 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:21,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:21,136 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:21,137 INFO L82 PathProgramCache]: Analyzing trace with hash -381462888, now seen corresponding path program 65 times [2021-05-02 23:17:21,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:21,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399790802] [2021-05-02 23:17:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:21,141 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:21,141 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:23,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:23,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:23,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399790802] [2021-05-02 23:17:23,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [399790802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:23,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:23,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:23,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302845065] [2021-05-02 23:17:23,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:23,190 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:23,679 INFO L93 Difference]: Finished difference Result 419 states and 422 transitions. [2021-05-02 23:17:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 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 274 [2021-05-02 23:17:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:23,680 INFO L225 Difference]: With dead ends: 419 [2021-05-02 23:17:23,680 INFO L226 Difference]: Without dead ends: 281 [2021-05-02 23:17:23,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1957.9ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-02 23:17:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-05-02 23:17:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-05-02 23:17:23,684 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2021-05-02 23:17:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:23,684 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-05-02 23:17:23,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-05-02 23:17:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-02 23:17:23,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:23,685 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:23,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:23,685 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:23,686 INFO L82 PathProgramCache]: Analyzing trace with hash -812286564, now seen corresponding path program 66 times [2021-05-02 23:17:23,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:23,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53134688] [2021-05-02 23:17:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:23,691 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:23,692 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:25,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53134688] [2021-05-02 23:17:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [53134688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:25,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:25,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:25,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132436526] [2021-05-02 23:17:25,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:25,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:25,815 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:26,524 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2021-05-02 23:17:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 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 278 [2021-05-02 23:17:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:26,525 INFO L225 Difference]: With dead ends: 425 [2021-05-02 23:17:26,526 INFO L226 Difference]: Without dead ends: 285 [2021-05-02 23:17:26,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2020.0ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-02 23:17:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2021-05-02 23:17:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2021-05-02 23:17:26,531 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2021-05-02 23:17:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:26,531 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2021-05-02 23:17:26,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2021-05-02 23:17:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-02 23:17:26,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:26,533 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:26,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:26,533 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 818516640, now seen corresponding path program 67 times [2021-05-02 23:17:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:26,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322522109] [2021-05-02 23:17:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:26,539 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:26,539 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,787 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 23:17:28,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:28,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322522109] [2021-05-02 23:17:28,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322522109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:28,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:28,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:28,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090064414] [2021-05-02 23:17:28,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:28,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:28,789 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:29,330 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2021-05-02 23:17:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 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 282 [2021-05-02 23:17:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:29,331 INFO L225 Difference]: With dead ends: 431 [2021-05-02 23:17:29,331 INFO L226 Difference]: Without dead ends: 289 [2021-05-02 23:17:29,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2128.3ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-02 23:17:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2021-05-02 23:17:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2021-05-02 23:17:29,335 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2021-05-02 23:17:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:29,335 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2021-05-02 23:17:29,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2021-05-02 23:17:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-02 23:17:29,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:29,336 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:29,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:29,336 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1657498204, now seen corresponding path program 68 times [2021-05-02 23:17:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:29,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531247263] [2021-05-02 23:17:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:29,340 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:29,341 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:31,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531247263] [2021-05-02 23:17:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531247263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:31,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:31,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358664675] [2021-05-02 23:17:31,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:31,541 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:32,063 INFO L93 Difference]: Finished difference Result 437 states and 440 transitions. [2021-05-02 23:17:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 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 286 [2021-05-02 23:17:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:32,064 INFO L225 Difference]: With dead ends: 437 [2021-05-02 23:17:32,064 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 23:17:32,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2110.2ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 23:17:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-05-02 23:17:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2021-05-02 23:17:32,068 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2021-05-02 23:17:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:32,068 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2021-05-02 23:17:32,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2021-05-02 23:17:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 23:17:32,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:32,069 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:32,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:32,069 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1549039960, now seen corresponding path program 69 times [2021-05-02 23:17:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:32,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445746369] [2021-05-02 23:17:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:32,074 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:32,074 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:34,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:34,328 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445746369] [2021-05-02 23:17:34,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445746369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:34,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:34,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:34,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864646641] [2021-05-02 23:17:34,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:34,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:34,329 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:34,942 INFO L93 Difference]: Finished difference Result 443 states and 446 transitions. [2021-05-02 23:17:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 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 290 [2021-05-02 23:17:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:34,943 INFO L225 Difference]: With dead ends: 443 [2021-05-02 23:17:34,943 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 23:17:34,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2160.4ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 23:17:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2021-05-02 23:17:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2021-05-02 23:17:34,947 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2021-05-02 23:17:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:34,948 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2021-05-02 23:17:34,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2021-05-02 23:17:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-02 23:17:34,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:34,949 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:34,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:34,949 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1367565740, now seen corresponding path program 70 times [2021-05-02 23:17:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:34,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763586725] [2021-05-02 23:17:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:34,953 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:34,954 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:37,439 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:37,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763586725] [2021-05-02 23:17:37,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [763586725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:37,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:37,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034276116] [2021-05-02 23:17:37,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:37,441 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:38,171 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2021-05-02 23:17:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 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 294 [2021-05-02 23:17:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:38,173 INFO L225 Difference]: With dead ends: 449 [2021-05-02 23:17:38,173 INFO L226 Difference]: Without dead ends: 301 [2021-05-02 23:17:38,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2382.4ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-02 23:17:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-05-02 23:17:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2021-05-02 23:17:38,178 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2021-05-02 23:17:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,179 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2021-05-02 23:17:38,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2021-05-02 23:17:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-02 23:17:38,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,180 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:38,180 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1299107152, now seen corresponding path program 71 times [2021-05-02 23:17:38,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305493200] [2021-05-02 23:17:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,186 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,187 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:40,651 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305493200] [2021-05-02 23:17:40,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [305493200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:40,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006245343] [2021-05-02 23:17:40,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:40,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:40,652 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:41,426 INFO L93 Difference]: Finished difference Result 455 states and 458 transitions. [2021-05-02 23:17:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 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 298 [2021-05-02 23:17:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:41,427 INFO L225 Difference]: With dead ends: 455 [2021-05-02 23:17:41,427 INFO L226 Difference]: Without dead ends: 305 [2021-05-02 23:17:41,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2343.3ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-05-02 23:17:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2021-05-02 23:17:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2021-05-02 23:17:41,431 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2021-05-02 23:17:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,431 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2021-05-02 23:17:41,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2021-05-02 23:17:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-02 23:17:41,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,432 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:41,433 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1361702324, now seen corresponding path program 72 times [2021-05-02 23:17:41,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699000938] [2021-05-02 23:17:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,437 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:41,437 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:43,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:43,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699000938] [2021-05-02 23:17:43,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [699000938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:43,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:43,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:43,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118363948] [2021-05-02 23:17:43,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:43,974 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:44,695 INFO L93 Difference]: Finished difference Result 461 states and 464 transitions. [2021-05-02 23:17:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 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 302 [2021-05-02 23:17:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:44,696 INFO L225 Difference]: With dead ends: 461 [2021-05-02 23:17:44,696 INFO L226 Difference]: Without dead ends: 309 [2021-05-02 23:17:44,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2432.8ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-02 23:17:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2021-05-02 23:17:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2021-05-02 23:17:44,701 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2021-05-02 23:17:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:44,701 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2021-05-02 23:17:44,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2021-05-02 23:17:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-05-02 23:17:44,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:44,702 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:44,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:44,702 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1239247176, now seen corresponding path program 73 times [2021-05-02 23:17:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:44,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108334817] [2021-05-02 23:17:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:44,707 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:44,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:47,310 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:47,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108334817] [2021-05-02 23:17:47,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108334817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:47,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:47,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268989104] [2021-05-02 23:17:47,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:47,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:47,312 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:48,171 INFO L93 Difference]: Finished difference Result 467 states and 470 transitions. [2021-05-02 23:17:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 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 306 [2021-05-02 23:17:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:48,172 INFO L225 Difference]: With dead ends: 467 [2021-05-02 23:17:48,172 INFO L226 Difference]: Without dead ends: 313 [2021-05-02 23:17:48,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2497.6ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-02 23:17:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-05-02 23:17:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0065359477124183) internal successors, (308), 306 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2021-05-02 23:17:48,177 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2021-05-02 23:17:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:48,177 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2021-05-02 23:17:48,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2021-05-02 23:17:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-05-02 23:17:48,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:48,178 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:48,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:48,178 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash -389009988, now seen corresponding path program 74 times [2021-05-02 23:17:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026619185] [2021-05-02 23:17:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:48,182 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:48,183 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:50,872 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:50,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026619185] [2021-05-02 23:17:50,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026619185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:50,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:50,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167827092] [2021-05-02 23:17:50,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:50,874 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:51,592 INFO L93 Difference]: Finished difference Result 473 states and 476 transitions. [2021-05-02 23:17:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 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 310 [2021-05-02 23:17:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:51,593 INFO L225 Difference]: With dead ends: 473 [2021-05-02 23:17:51,593 INFO L226 Difference]: Without dead ends: 317 [2021-05-02 23:17:51,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2554.6ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-02 23:17:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2021-05-02 23:17:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0064516129032257) internal successors, (312), 310 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2021-05-02 23:17:51,597 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2021-05-02 23:17:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:51,598 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2021-05-02 23:17:51,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2021-05-02 23:17:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-05-02 23:17:51,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:51,599 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:51,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:51,599 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash -284708160, now seen corresponding path program 75 times [2021-05-02 23:17:51,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:51,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513153731] [2021-05-02 23:17:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:51,604 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:51,604 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:54,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:54,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513153731] [2021-05-02 23:17:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513153731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:17:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577125497] [2021-05-02 23:17:54,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:17:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:17:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:54,356 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:55,020 INFO L93 Difference]: Finished difference Result 479 states and 482 transitions. [2021-05-02 23:17:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:17:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 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 314 [2021-05-02 23:17:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:55,022 INFO L225 Difference]: With dead ends: 479 [2021-05-02 23:17:55,022 INFO L226 Difference]: Without dead ends: 321 [2021-05-02 23:17:55,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2643.6ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-02 23:17:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2021-05-02 23:17:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0063694267515924) internal successors, (316), 314 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2021-05-02 23:17:55,026 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2021-05-02 23:17:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:55,026 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2021-05-02 23:17:55,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2021-05-02 23:17:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-05-02 23:17:55,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:55,028 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:55,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:55,028 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1293821380, now seen corresponding path program 76 times [2021-05-02 23:17:55,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:55,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062828255] [2021-05-02 23:17:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:55,032 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:55,033 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:57,888 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 23:17:57,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:57,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062828255] [2021-05-02 23:17:57,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062828255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:57,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:57,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:17:57,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665095883] [2021-05-02 23:17:57,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:17:57,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:17:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:57,890 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:58,681 INFO L93 Difference]: Finished difference Result 485 states and 488 transitions. [2021-05-02 23:17:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:17:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 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 318 [2021-05-02 23:17:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:58,683 INFO L225 Difference]: With dead ends: 485 [2021-05-02 23:17:58,683 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 23:17:58,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2743.4ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 23:17:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-05-02 23:17:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0062893081761006) internal successors, (320), 318 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2021-05-02 23:17:58,687 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2021-05-02 23:17:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:58,688 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2021-05-02 23:17:58,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2021-05-02 23:17:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-05-02 23:17:58,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:58,689 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:58,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:58,689 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2048358712, now seen corresponding path program 77 times [2021-05-02 23:17:58,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:58,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651092069] [2021-05-02 23:17:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:58,693 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:58,694 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:01,558 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:01,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651092069] [2021-05-02 23:18:01,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651092069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:01,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:01,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:18:01,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896988298] [2021-05-02 23:18:01,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:18:01,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:18:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:01,560 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:02,408 INFO L93 Difference]: Finished difference Result 491 states and 494 transitions. [2021-05-02 23:18:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:18:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 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 322 [2021-05-02 23:18:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:02,409 INFO L225 Difference]: With dead ends: 491 [2021-05-02 23:18:02,410 INFO L226 Difference]: Without dead ends: 329 [2021-05-02 23:18:02,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2756.4ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-05-02 23:18:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2021-05-02 23:18:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.0062111801242235) internal successors, (324), 322 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2021-05-02 23:18:02,414 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2021-05-02 23:18:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:02,414 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2021-05-02 23:18:02,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2021-05-02 23:18:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-05-02 23:18:02,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:02,416 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:02,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:18:02,416 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1698966068, now seen corresponding path program 78 times [2021-05-02 23:18:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:02,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547158078] [2021-05-02 23:18:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:02,420 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:02,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:05,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:05,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547158078] [2021-05-02 23:18:05,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547158078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:05,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:05,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:18:05,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913549439] [2021-05-02 23:18:05,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:18:05,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:18:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:05,435 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:06,116 INFO L93 Difference]: Finished difference Result 497 states and 500 transitions. [2021-05-02 23:18:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:18:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 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 326 [2021-05-02 23:18:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:06,118 INFO L225 Difference]: With dead ends: 497 [2021-05-02 23:18:06,118 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 23:18:06,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2896.6ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 23:18:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-05-02 23:18:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0061349693251533) internal successors, (328), 326 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2021-05-02 23:18:06,146 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2021-05-02 23:18:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:06,146 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2021-05-02 23:18:06,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2021-05-02 23:18:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-05-02 23:18:06,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:06,147 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:06,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:18:06,148 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1955786032, now seen corresponding path program 79 times [2021-05-02 23:18:06,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:06,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525277770] [2021-05-02 23:18:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:06,152 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:06,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:09,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:09,306 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:09,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525277770] [2021-05-02 23:18:09,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [525277770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:09,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:09,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:18:09,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650374513] [2021-05-02 23:18:09,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:18:09,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:09,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:18:09,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:09,307 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:10,164 INFO L93 Difference]: Finished difference Result 503 states and 506 transitions. [2021-05-02 23:18:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:18:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 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 330 [2021-05-02 23:18:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:10,165 INFO L225 Difference]: With dead ends: 503 [2021-05-02 23:18:10,165 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 23:18:10,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3030.6ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 23:18:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2021-05-02 23:18:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.006060606060606) internal successors, (332), 330 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2021-05-02 23:18:10,169 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2021-05-02 23:18:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:10,170 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2021-05-02 23:18:10,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2021-05-02 23:18:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-05-02 23:18:10,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:10,171 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:10,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:18:10,171 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash -699318828, now seen corresponding path program 80 times [2021-05-02 23:18:10,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:10,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863857387] [2021-05-02 23:18:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:10,175 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:10,176 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:13,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:13,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:13,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863857387] [2021-05-02 23:18:13,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [863857387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:13,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:13,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:18:13,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141063364] [2021-05-02 23:18:13,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:18:13,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:18:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:13,365 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:14,340 INFO L93 Difference]: Finished difference Result 509 states and 512 transitions. [2021-05-02 23:18:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:18:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 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 334 [2021-05-02 23:18:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:14,342 INFO L225 Difference]: With dead ends: 509 [2021-05-02 23:18:14,342 INFO L226 Difference]: Without dead ends: 341 [2021-05-02 23:18:14,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3050.9ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-02 23:18:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2021-05-02 23:18:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.0059880239520957) internal successors, (336), 334 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2021-05-02 23:18:14,363 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2021-05-02 23:18:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:14,363 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2021-05-02 23:18:14,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2021-05-02 23:18:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-05-02 23:18:14,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:14,364 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:14,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:18:14,365 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -130197800, now seen corresponding path program 81 times [2021-05-02 23:18:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:14,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247521875] [2021-05-02 23:18:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:14,369 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:14,370 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:17,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247521875] [2021-05-02 23:18:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [247521875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:17,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:17,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:18:17,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435496786] [2021-05-02 23:18:17,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:18:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:18:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:17,628 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:18,513 INFO L93 Difference]: Finished difference Result 515 states and 518 transitions. [2021-05-02 23:18:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:18:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 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 338 [2021-05-02 23:18:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:18,515 INFO L225 Difference]: With dead ends: 515 [2021-05-02 23:18:18,515 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 23:18:18,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 3131.1ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 23:18:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 343. [2021-05-02 23:18:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.0059171597633136) internal successors, (340), 338 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2021-05-02 23:18:18,519 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2021-05-02 23:18:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:18,520 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2021-05-02 23:18:18,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2021-05-02 23:18:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-05-02 23:18:18,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:18,521 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:18,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:18:18,521 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash -326738468, now seen corresponding path program 82 times [2021-05-02 23:18:18,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:18,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873558471] [2021-05-02 23:18:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:18,525 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:18,526 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:21,597 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873558471] [2021-05-02 23:18:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [873558471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:21,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:21,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:18:21,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806318852] [2021-05-02 23:18:21,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:18:21,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:18:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:21,598 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:22,685 INFO L93 Difference]: Finished difference Result 521 states and 524 transitions. [2021-05-02 23:18:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:18:22,685 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 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 342 [2021-05-02 23:18:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:22,686 INFO L225 Difference]: With dead ends: 521 [2021-05-02 23:18:22,686 INFO L226 Difference]: Without dead ends: 349 [2021-05-02 23:18:22,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2956.9ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-02 23:18:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-05-02 23:18:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.0058479532163742) internal successors, (344), 342 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2021-05-02 23:18:22,690 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2021-05-02 23:18:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:22,690 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2021-05-02 23:18:22,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2021-05-02 23:18:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-05-02 23:18:22,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:22,692 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:22,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:18:22,692 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1392422176, now seen corresponding path program 83 times [2021-05-02 23:18:22,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:22,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992135944] [2021-05-02 23:18:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:22,696 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:22,697 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:25,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:25,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992135944] [2021-05-02 23:18:25,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [992135944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:25,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:25,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:18:25,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481162487] [2021-05-02 23:18:25,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:18:25,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:18:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:25,874 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:26,771 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2021-05-02 23:18:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:18:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 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 346 [2021-05-02 23:18:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:26,772 INFO L225 Difference]: With dead ends: 527 [2021-05-02 23:18:26,772 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 23:18:26,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3057.7ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 23:18:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2021-05-02 23:18:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0057803468208093) internal successors, (348), 346 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2021-05-02 23:18:26,777 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2021-05-02 23:18:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:26,777 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2021-05-02 23:18:26,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2021-05-02 23:18:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-05-02 23:18:26,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:26,779 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:26,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:18:26,779 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1308412444, now seen corresponding path program 84 times [2021-05-02 23:18:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015796498] [2021-05-02 23:18:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:26,804 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:26,805 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:29,948 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015796498] [2021-05-02 23:18:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015796498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:29,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:29,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:29,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777399371] [2021-05-02 23:18:29,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:29,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:29,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:29,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:29,949 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:30,675 INFO L93 Difference]: Finished difference Result 533 states and 536 transitions. [2021-05-02 23:18:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 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 350 [2021-05-02 23:18:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:30,679 INFO L225 Difference]: With dead ends: 533 [2021-05-02 23:18:30,679 INFO L226 Difference]: Without dead ends: 357 [2021-05-02 23:18:30,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2972.2ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-02 23:18:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2021-05-02 23:18:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.0057142857142858) internal successors, (352), 350 states have internal predecessors, (352), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2021-05-02 23:18:30,691 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2021-05-02 23:18:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:30,691 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2021-05-02 23:18:30,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2021-05-02 23:18:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-05-02 23:18:30,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:30,700 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:30,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:30,701 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1918961384, now seen corresponding path program 85 times [2021-05-02 23:18:30,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:30,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051465766] [2021-05-02 23:18:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:30,706 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:30,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:34,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:34,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:34,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051465766] [2021-05-02 23:18:34,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051465766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:34,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:34,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:34,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838691325] [2021-05-02 23:18:34,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:34,476 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:35,504 INFO L93 Difference]: Finished difference Result 539 states and 542 transitions. [2021-05-02 23:18:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 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 354 [2021-05-02 23:18:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:35,506 INFO L225 Difference]: With dead ends: 539 [2021-05-02 23:18:35,506 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 23:18:35,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3579.1ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 23:18:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-05-02 23:18:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.0056497175141244) internal successors, (356), 354 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2021-05-02 23:18:35,513 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2021-05-02 23:18:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:35,513 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2021-05-02 23:18:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2021-05-02 23:18:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-05-02 23:18:35,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:35,515 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:35,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:35,515 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -479214100, now seen corresponding path program 86 times [2021-05-02 23:18:35,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:35,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830836180] [2021-05-02 23:18:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:35,521 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:35,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:38,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830836180] [2021-05-02 23:18:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830836180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:38,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:38,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794270034] [2021-05-02 23:18:38,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:38,981 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:40,099 INFO L93 Difference]: Finished difference Result 545 states and 548 transitions. [2021-05-02 23:18:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 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 358 [2021-05-02 23:18:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:40,101 INFO L225 Difference]: With dead ends: 545 [2021-05-02 23:18:40,101 INFO L226 Difference]: Without dead ends: 365 [2021-05-02 23:18:40,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3323.7ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-02 23:18:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 363. [2021-05-02 23:18:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.005586592178771) internal successors, (360), 358 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 364 transitions. [2021-05-02 23:18:40,106 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 364 transitions. Word has length 358 [2021-05-02 23:18:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:40,106 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 364 transitions. [2021-05-02 23:18:40,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 364 transitions. [2021-05-02 23:18:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-05-02 23:18:40,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:40,127 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:40,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:40,127 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:40,127 INFO L82 PathProgramCache]: Analyzing trace with hash -117148944, now seen corresponding path program 87 times [2021-05-02 23:18:40,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:40,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909766258] [2021-05-02 23:18:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:40,132 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:40,133 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:43,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:43,534 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909766258] [2021-05-02 23:18:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [909766258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:43,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:43,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:43,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384154304] [2021-05-02 23:18:43,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:43,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:43,536 INFO L87 Difference]: Start difference. First operand 363 states and 364 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:44,529 INFO L93 Difference]: Finished difference Result 551 states and 554 transitions. [2021-05-02 23:18:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 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 362 [2021-05-02 23:18:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:44,530 INFO L225 Difference]: With dead ends: 551 [2021-05-02 23:18:44,530 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 23:18:44,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3274.2ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 23:18:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2021-05-02 23:18:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.0055248618784531) internal successors, (364), 362 states have internal predecessors, (364), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2021-05-02 23:18:44,535 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 362 [2021-05-02 23:18:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:44,535 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2021-05-02 23:18:44,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2021-05-02 23:18:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-05-02 23:18:44,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:44,536 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:44,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:44,537 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash 628362740, now seen corresponding path program 88 times [2021-05-02 23:18:44,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:44,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630663442] [2021-05-02 23:18:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:44,559 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:44,560 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:47,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:47,749 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:47,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630663442] [2021-05-02 23:18:47,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [630663442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:47,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:47,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:47,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850198734] [2021-05-02 23:18:47,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:47,751 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:49,187 INFO L93 Difference]: Finished difference Result 557 states and 560 transitions. [2021-05-02 23:18:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 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 366 [2021-05-02 23:18:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:49,190 INFO L225 Difference]: With dead ends: 557 [2021-05-02 23:18:49,190 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 23:18:49,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3053.4ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 23:18:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2021-05-02 23:18:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 366 states have (on average 1.005464480874317) internal successors, (368), 366 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 372 transitions. [2021-05-02 23:18:49,195 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 372 transitions. Word has length 366 [2021-05-02 23:18:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:49,195 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 372 transitions. [2021-05-02 23:18:49,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 372 transitions. [2021-05-02 23:18:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-05-02 23:18:49,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:49,196 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:49,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:49,197 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -644638984, now seen corresponding path program 89 times [2021-05-02 23:18:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069957465] [2021-05-02 23:18:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:49,202 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:49,202 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:52,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:52,841 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069957465] [2021-05-02 23:18:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069957465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891716287] [2021-05-02 23:18:52,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:52,843 INFO L87 Difference]: Start difference. First operand 371 states and 372 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:54,011 INFO L93 Difference]: Finished difference Result 563 states and 566 transitions. [2021-05-02 23:18:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:18:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 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 370 [2021-05-02 23:18:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:54,013 INFO L225 Difference]: With dead ends: 563 [2021-05-02 23:18:54,013 INFO L226 Difference]: Without dead ends: 377 [2021-05-02 23:18:54,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3494.5ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-02 23:18:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-05-02 23:18:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.0054054054054054) internal successors, (372), 370 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 376 transitions. [2021-05-02 23:18:54,020 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 376 transitions. Word has length 370 [2021-05-02 23:18:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:54,020 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 376 transitions. [2021-05-02 23:18:54,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 376 transitions. [2021-05-02 23:18:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-05-02 23:18:54,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:54,042 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:54,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:54,042 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash 79171068, now seen corresponding path program 90 times [2021-05-02 23:18:54,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:54,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862915058] [2021-05-02 23:18:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:54,047 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:54,048 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:57,491 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862915058] [2021-05-02 23:18:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862915058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:57,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:57,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:18:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543981422] [2021-05-02 23:18:57,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:18:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:18:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:57,493 INFO L87 Difference]: Start difference. First operand 375 states and 376 transitions. Second operand has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:58,395 INFO L93 Difference]: Finished difference Result 569 states and 572 transitions. [2021-05-02 23:18:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:18:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 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 374 [2021-05-02 23:18:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:58,397 INFO L225 Difference]: With dead ends: 569 [2021-05-02 23:18:58,397 INFO L226 Difference]: Without dead ends: 381 [2021-05-02 23:18:58,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3284.1ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-02 23:18:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2021-05-02 23:18:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.0053475935828877) internal successors, (376), 374 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2021-05-02 23:18:58,403 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 374 [2021-05-02 23:18:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:58,403 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2021-05-02 23:18:58,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2021-05-02 23:18:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-05-02 23:18:58,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:58,405 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:58,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:58,405 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1799982336, now seen corresponding path program 91 times [2021-05-02 23:18:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532674658] [2021-05-02 23:18:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:58,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:58,411 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:01,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:01,958 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:01,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532674658] [2021-05-02 23:19:01,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [532674658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:01,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:01,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:19:01,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016210953] [2021-05-02 23:19:01,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:19:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:19:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:19:01,960 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:03,242 INFO L93 Difference]: Finished difference Result 575 states and 578 transitions. [2021-05-02 23:19:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:19:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 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 378 [2021-05-02 23:19:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:03,243 INFO L225 Difference]: With dead ends: 575 [2021-05-02 23:19:03,243 INFO L226 Difference]: Without dead ends: 385 [2021-05-02 23:19:03,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3377.7ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:19:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-02 23:19:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2021-05-02 23:19:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.0052910052910053) internal successors, (380), 378 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 384 transitions. [2021-05-02 23:19:03,248 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 384 transitions. Word has length 378 [2021-05-02 23:19:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:03,248 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 384 transitions. [2021-05-02 23:19:03,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 384 transitions. [2021-05-02 23:19:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-05-02 23:19:03,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:03,250 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:03,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:19:03,250 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash -169622012, now seen corresponding path program 92 times [2021-05-02 23:19:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:03,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605996183] [2021-05-02 23:19:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:03,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:03,256 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:07,427 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:07,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605996183] [2021-05-02 23:19:07,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [605996183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:07,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:07,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:19:07,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172133159] [2021-05-02 23:19:07,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:19:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:19:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:07,429 INFO L87 Difference]: Start difference. First operand 383 states and 384 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:09,115 INFO L93 Difference]: Finished difference Result 581 states and 584 transitions. [2021-05-02 23:19:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:19:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 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 382 [2021-05-02 23:19:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:09,117 INFO L225 Difference]: With dead ends: 581 [2021-05-02 23:19:09,117 INFO L226 Difference]: Without dead ends: 389 [2021-05-02 23:19:09,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3997.6ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-02 23:19:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2021-05-02 23:19:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.0052356020942408) internal successors, (384), 382 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 388 transitions. [2021-05-02 23:19:09,123 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 388 transitions. Word has length 382 [2021-05-02 23:19:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:09,123 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 388 transitions. [2021-05-02 23:19:09,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 388 transitions. [2021-05-02 23:19:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-05-02 23:19:09,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:09,124 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:09,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:19:09,124 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1827338488, now seen corresponding path program 93 times [2021-05-02 23:19:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:09,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116323428] [2021-05-02 23:19:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:09,130 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:09,130 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:12,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:12,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:12,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116323428] [2021-05-02 23:19:12,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116323428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:12,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:12,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:19:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402249504] [2021-05-02 23:19:12,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:19:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:19:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:12,675 INFO L87 Difference]: Start difference. First operand 387 states and 388 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:13,845 INFO L93 Difference]: Finished difference Result 587 states and 590 transitions. [2021-05-02 23:19:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:19:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 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 386 [2021-05-02 23:19:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:13,847 INFO L225 Difference]: With dead ends: 587 [2021-05-02 23:19:13,847 INFO L226 Difference]: Without dead ends: 393 [2021-05-02 23:19:13,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3393.6ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-02 23:19:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 391. [2021-05-02 23:19:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 386 states have (on average 1.005181347150259) internal successors, (388), 386 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 392 transitions. [2021-05-02 23:19:13,854 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 392 transitions. Word has length 386 [2021-05-02 23:19:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:13,854 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 392 transitions. [2021-05-02 23:19:13,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 392 transitions. [2021-05-02 23:19:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-05-02 23:19:13,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:13,855 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:13,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:19:13,855 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1436497420, now seen corresponding path program 94 times [2021-05-02 23:19:13,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:13,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800938798] [2021-05-02 23:19:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:13,860 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:13,861 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:17,460 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:17,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800938798] [2021-05-02 23:19:17,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [800938798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:17,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:17,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:19:17,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510891619] [2021-05-02 23:19:17,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:19:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:19:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:17,462 INFO L87 Difference]: Start difference. First operand 391 states and 392 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:18,825 INFO L93 Difference]: Finished difference Result 593 states and 596 transitions. [2021-05-02 23:19:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:19:18,826 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 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 390 [2021-05-02 23:19:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:18,827 INFO L225 Difference]: With dead ends: 593 [2021-05-02 23:19:18,827 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 23:19:18,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3450.1ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 23:19:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2021-05-02 23:19:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.005128205128205) internal successors, (392), 390 states have internal predecessors, (392), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 396 transitions. [2021-05-02 23:19:18,832 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 396 transitions. Word has length 390 [2021-05-02 23:19:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:18,832 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 396 transitions. [2021-05-02 23:19:18,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 396 transitions. [2021-05-02 23:19:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-05-02 23:19:18,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:18,833 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:18,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:19:18,833 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash 626479888, now seen corresponding path program 95 times [2021-05-02 23:19:18,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:18,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717413977] [2021-05-02 23:19:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:18,838 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:18,838 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:22,992 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 23:19:22,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717413977] [2021-05-02 23:19:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [717413977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:22,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:22,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:19:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865346156] [2021-05-02 23:19:22,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:19:22,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:19:22,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:22,994 INFO L87 Difference]: Start difference. First operand 395 states and 396 transitions. Second operand has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:24,381 INFO L93 Difference]: Finished difference Result 599 states and 602 transitions. [2021-05-02 23:19:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:19:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 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 394 [2021-05-02 23:19:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:24,383 INFO L225 Difference]: With dead ends: 599 [2021-05-02 23:19:24,383 INFO L226 Difference]: Without dead ends: 401 [2021-05-02 23:19:24,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 4001.9ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-02 23:19:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2021-05-02 23:19:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 394 states have (on average 1.0050761421319796) internal successors, (396), 394 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 400 transitions. [2021-05-02 23:19:24,389 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 400 transitions. Word has length 394 [2021-05-02 23:19:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:24,389 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 400 transitions. [2021-05-02 23:19:24,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 400 transitions. [2021-05-02 23:19:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-05-02 23:19:24,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:24,390 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:24,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:19:24,390 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:24,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1754422804, now seen corresponding path program 96 times [2021-05-02 23:19:24,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:24,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093654138] [2021-05-02 23:19:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:24,401 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:24,402 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:28,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:28,718 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093654138] [2021-05-02 23:19:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093654138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:28,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:28,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:19:28,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026382481] [2021-05-02 23:19:28,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:19:28,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:19:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:28,719 INFO L87 Difference]: Start difference. First operand 399 states and 400 transitions. Second operand has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:29,763 INFO L93 Difference]: Finished difference Result 605 states and 608 transitions. [2021-05-02 23:19:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:19:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 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 398 [2021-05-02 23:19:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:29,769 INFO L225 Difference]: With dead ends: 605 [2021-05-02 23:19:29,769 INFO L226 Difference]: Without dead ends: 405 [2021-05-02 23:19:29,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4117.2ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-02 23:19:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 403. [2021-05-02 23:19:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 398 states have (on average 1.0050251256281406) internal successors, (400), 398 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2021-05-02 23:19:29,789 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 398 [2021-05-02 23:19:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:29,789 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2021-05-02 23:19:29,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2021-05-02 23:19:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-05-02 23:19:29,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:29,791 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:29,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:19:29,791 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2077927656, now seen corresponding path program 97 times [2021-05-02 23:19:29,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:29,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317072477] [2021-05-02 23:19:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:29,804 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:29,805 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:34,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317072477] [2021-05-02 23:19:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317072477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:34,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:19:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199618550] [2021-05-02 23:19:34,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:19:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:19:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:34,084 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:35,759 INFO L93 Difference]: Finished difference Result 611 states and 614 transitions. [2021-05-02 23:19:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:19:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 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 402 [2021-05-02 23:19:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:35,760 INFO L225 Difference]: With dead ends: 611 [2021-05-02 23:19:35,760 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 23:19:35,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4093.4ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 23:19:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2021-05-02 23:19:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.0049751243781095) internal successors, (404), 402 states have internal predecessors, (404), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 408 transitions. [2021-05-02 23:19:35,766 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 408 transitions. Word has length 402 [2021-05-02 23:19:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:35,766 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 408 transitions. [2021-05-02 23:19:35,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 408 transitions. [2021-05-02 23:19:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-05-02 23:19:35,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:35,768 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:35,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:19:35,768 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1533361692, now seen corresponding path program 98 times [2021-05-02 23:19:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:35,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694997392] [2021-05-02 23:19:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:35,773 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:35,773 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:40,314 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694997392] [2021-05-02 23:19:40,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [694997392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:40,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:40,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:19:40,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066470706] [2021-05-02 23:19:40,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:19:40,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:40,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:19:40,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:40,316 INFO L87 Difference]: Start difference. First operand 407 states and 408 transitions. Second operand has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:41,586 INFO L93 Difference]: Finished difference Result 617 states and 620 transitions. [2021-05-02 23:19:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:19:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 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 406 [2021-05-02 23:19:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:41,587 INFO L225 Difference]: With dead ends: 617 [2021-05-02 23:19:41,587 INFO L226 Difference]: Without dead ends: 413 [2021-05-02 23:19:41,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4379.1ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-02 23:19:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 411. [2021-05-02 23:19:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 406 states have (on average 1.0049261083743843) internal successors, (408), 406 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 412 transitions. [2021-05-02 23:19:41,592 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 412 transitions. Word has length 406 [2021-05-02 23:19:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:41,592 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 412 transitions. [2021-05-02 23:19:41,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 412 transitions. [2021-05-02 23:19:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-05-02 23:19:41,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:41,594 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:41,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:19:41,594 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash -802745568, now seen corresponding path program 99 times [2021-05-02 23:19:41,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:41,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979576149] [2021-05-02 23:19:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:41,599 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:41,599 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:46,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:46,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979576149] [2021-05-02 23:19:46,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [979576149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:46,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:46,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:19:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117567954] [2021-05-02 23:19:46,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:19:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:19:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:46,091 INFO L87 Difference]: Start difference. First operand 411 states and 412 transitions. Second operand has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:47,314 INFO L93 Difference]: Finished difference Result 623 states and 626 transitions. [2021-05-02 23:19:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:19:47,314 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 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 410 [2021-05-02 23:19:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:47,315 INFO L225 Difference]: With dead ends: 623 [2021-05-02 23:19:47,315 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 23:19:47,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4340.5ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 23:19:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 415. [2021-05-02 23:19:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.0048780487804878) internal successors, (412), 410 states have internal predecessors, (412), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2021-05-02 23:19:47,321 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 410 [2021-05-02 23:19:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:47,321 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2021-05-02 23:19:47,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2021-05-02 23:19:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-05-02 23:19:47,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:47,323 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:47,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:47,323 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1119868452, now seen corresponding path program 100 times [2021-05-02 23:19:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467130582] [2021-05-02 23:19:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:47,328 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:47,329 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:52,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:52,437 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:52,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467130582] [2021-05-02 23:19:52,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [467130582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:52,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:52,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:19:52,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477975387] [2021-05-02 23:19:52,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:19:52,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:19:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:52,439 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:54,090 INFO L93 Difference]: Finished difference Result 629 states and 632 transitions. [2021-05-02 23:19:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 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 414 [2021-05-02 23:19:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:54,092 INFO L225 Difference]: With dead ends: 629 [2021-05-02 23:19:54,092 INFO L226 Difference]: Without dead ends: 421 [2021-05-02 23:19:54,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4943.6ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-02 23:19:54,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 419. [2021-05-02 23:19:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 414 states have (on average 1.0048309178743962) internal successors, (416), 414 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 420 transitions. [2021-05-02 23:19:54,102 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 420 transitions. Word has length 414 [2021-05-02 23:19:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:54,102 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 420 transitions. [2021-05-02 23:19:54,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 420 transitions. [2021-05-02 23:19:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-05-02 23:19:54,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:54,103 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:54,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:54,104 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash 302286632, now seen corresponding path program 101 times [2021-05-02 23:19:54,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:54,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567797389] [2021-05-02 23:19:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:54,112 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:54,113 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:59,587 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567797389] [2021-05-02 23:19:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [567797389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:59,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:59,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:19:59,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417931214] [2021-05-02 23:19:59,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:19:59,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:19:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:59,600 INFO L87 Difference]: Start difference. First operand 419 states and 420 transitions. Second operand has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:02,060 INFO L93 Difference]: Finished difference Result 635 states and 638 transitions. [2021-05-02 23:20:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:20:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 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 418 [2021-05-02 23:20:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:02,062 INFO L225 Difference]: With dead ends: 635 [2021-05-02 23:20:02,063 INFO L226 Difference]: Without dead ends: 425 [2021-05-02 23:20:02,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 5253.8ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:20:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-02 23:20:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2021-05-02 23:20:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 418 states have (on average 1.0047846889952152) internal successors, (420), 418 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 424 transitions. [2021-05-02 23:20:02,073 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 424 transitions. Word has length 418 [2021-05-02 23:20:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:02,073 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 424 transitions. [2021-05-02 23:20:02,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 424 transitions. [2021-05-02 23:20:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-05-02 23:20:02,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:02,075 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:02,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:20:02,075 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash 457844268, now seen corresponding path program 102 times [2021-05-02 23:20:02,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:02,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188977649] [2021-05-02 23:20:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:02,082 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:02,084 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:06,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:06,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188977649] [2021-05-02 23:20:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188977649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:20:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774953484] [2021-05-02 23:20:06,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:20:06,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:20:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:20:06,921 INFO L87 Difference]: Start difference. First operand 423 states and 424 transitions. Second operand has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:09,218 INFO L93 Difference]: Finished difference Result 641 states and 644 transitions. [2021-05-02 23:20:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:20:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 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 422 [2021-05-02 23:20:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:09,220 INFO L225 Difference]: With dead ends: 641 [2021-05-02 23:20:09,220 INFO L226 Difference]: Without dead ends: 429 [2021-05-02 23:20:09,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4599.9ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:20:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-02 23:20:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 427. [2021-05-02 23:20:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 422 states have (on average 1.004739336492891) internal successors, (424), 422 states have internal predecessors, (424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 428 transitions. [2021-05-02 23:20:09,241 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 428 transitions. Word has length 422 [2021-05-02 23:20:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:09,241 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 428 transitions. [2021-05-02 23:20:09,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 428 transitions. [2021-05-02 23:20:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-05-02 23:20:09,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:09,242 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:09,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:20:09,243 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 979743536, now seen corresponding path program 103 times [2021-05-02 23:20:09,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:09,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15329050] [2021-05-02 23:20:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:09,258 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:09,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:14,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:14,719 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:14,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15329050] [2021-05-02 23:20:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [15329050] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:14,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:14,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:20:14,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543139081] [2021-05-02 23:20:14,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:20:14,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:20:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:14,721 INFO L87 Difference]: Start difference. First operand 427 states and 428 transitions. Second operand has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:16,529 INFO L93 Difference]: Finished difference Result 647 states and 650 transitions. [2021-05-02 23:20:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:20:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 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 426 [2021-05-02 23:20:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:16,530 INFO L225 Difference]: With dead ends: 647 [2021-05-02 23:20:16,530 INFO L226 Difference]: Without dead ends: 433 [2021-05-02 23:20:16,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5258.8ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-02 23:20:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-05-02 23:20:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 426 states have (on average 1.0046948356807512) internal successors, (428), 426 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 432 transitions. [2021-05-02 23:20:16,535 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 432 transitions. Word has length 426 [2021-05-02 23:20:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:16,536 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 432 transitions. [2021-05-02 23:20:16,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 432 transitions. [2021-05-02 23:20:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-05-02 23:20:16,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:16,537 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:16,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:20:16,537 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -911462860, now seen corresponding path program 104 times [2021-05-02 23:20:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:16,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223635996] [2021-05-02 23:20:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:16,542 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:16,542 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:22,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:22,050 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 23:20:22,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:22,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223635996] [2021-05-02 23:20:22,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [223635996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:22,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:22,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:20:22,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572510382] [2021-05-02 23:20:22,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:20:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:20:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:22,053 INFO L87 Difference]: Start difference. First operand 431 states and 432 transitions. Second operand has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:23,579 INFO L93 Difference]: Finished difference Result 653 states and 656 transitions. [2021-05-02 23:20:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:20:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 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 430 [2021-05-02 23:20:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:23,581 INFO L225 Difference]: With dead ends: 653 [2021-05-02 23:20:23,581 INFO L226 Difference]: Without dead ends: 437 [2021-05-02 23:20:23,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 5279.5ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-02 23:20:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 435. [2021-05-02 23:20:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.0046511627906978) internal successors, (432), 430 states have internal predecessors, (432), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 436 transitions. [2021-05-02 23:20:23,601 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 436 transitions. Word has length 430 [2021-05-02 23:20:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:23,601 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 436 transitions. [2021-05-02 23:20:23,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 436 transitions. [2021-05-02 23:20:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-05-02 23:20:23,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:23,603 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:23,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:20:23,603 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash 569546552, now seen corresponding path program 105 times [2021-05-02 23:20:23,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:23,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836027282] [2021-05-02 23:20:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:23,623 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:23,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:30,352 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836027282] [2021-05-02 23:20:30,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [836027282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:30,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:30,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:20:30,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899963176] [2021-05-02 23:20:30,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:20:30,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:20:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:30,354 INFO L87 Difference]: Start difference. First operand 435 states and 436 transitions. Second operand has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:31,960 INFO L93 Difference]: Finished difference Result 659 states and 662 transitions. [2021-05-02 23:20:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:20:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 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 434 [2021-05-02 23:20:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:31,962 INFO L225 Difference]: With dead ends: 659 [2021-05-02 23:20:31,962 INFO L226 Difference]: Without dead ends: 441 [2021-05-02 23:20:31,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6474.3ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-05-02 23:20:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 439. [2021-05-02 23:20:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 434 states have (on average 1.0046082949308757) internal successors, (436), 434 states have internal predecessors, (436), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2021-05-02 23:20:31,969 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 434 [2021-05-02 23:20:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:31,970 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2021-05-02 23:20:31,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2021-05-02 23:20:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-05-02 23:20:31,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:31,982 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:31,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:20:31,982 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash 445509180, now seen corresponding path program 106 times [2021-05-02 23:20:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:31,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526728724] [2021-05-02 23:20:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:31,988 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:31,989 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:38,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:38,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526728724] [2021-05-02 23:20:38,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526728724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:38,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:38,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:20:38,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431286938] [2021-05-02 23:20:38,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:20:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:20:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:20:38,035 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:39,947 INFO L93 Difference]: Finished difference Result 665 states and 668 transitions. [2021-05-02 23:20:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:20:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 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 438 [2021-05-02 23:20:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:39,949 INFO L225 Difference]: With dead ends: 665 [2021-05-02 23:20:39,949 INFO L226 Difference]: Without dead ends: 445 [2021-05-02 23:20:39,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5826.5ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:20:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-02 23:20:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2021-05-02 23:20:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.004566210045662) internal successors, (440), 438 states have internal predecessors, (440), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 444 transitions. [2021-05-02 23:20:39,955 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 444 transitions. Word has length 438 [2021-05-02 23:20:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:39,955 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 444 transitions. [2021-05-02 23:20:39,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 444 transitions. [2021-05-02 23:20:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-05-02 23:20:39,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:39,957 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:39,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:20:39,957 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1991036096, now seen corresponding path program 107 times [2021-05-02 23:20:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:39,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934823611] [2021-05-02 23:20:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:39,962 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:39,963 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:45,785 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:45,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934823611] [2021-05-02 23:20:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [934823611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:45,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:45,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:20:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775663001] [2021-05-02 23:20:45,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:20:45,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:20:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:20:45,790 INFO L87 Difference]: Start difference. First operand 443 states and 444 transitions. Second operand has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:47,389 INFO L93 Difference]: Finished difference Result 671 states and 674 transitions. [2021-05-02 23:20:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:20:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 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 442 [2021-05-02 23:20:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:47,391 INFO L225 Difference]: With dead ends: 671 [2021-05-02 23:20:47,391 INFO L226 Difference]: Without dead ends: 449 [2021-05-02 23:20:47,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5605.5ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:20:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-02 23:20:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2021-05-02 23:20:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 442 states have (on average 1.004524886877828) internal successors, (444), 442 states have internal predecessors, (444), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 448 transitions. [2021-05-02 23:20:47,408 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 448 transitions. Word has length 442 [2021-05-02 23:20:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:47,408 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 448 transitions. [2021-05-02 23:20:47,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 448 transitions. [2021-05-02 23:20:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-05-02 23:20:47,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:47,410 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:47,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:20:47,410 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1030265276, now seen corresponding path program 108 times [2021-05-02 23:20:47,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:47,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597767095] [2021-05-02 23:20:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:47,425 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:47,426 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:53,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:53,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:53,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597767095] [2021-05-02 23:20:53,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [597767095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:53,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:53,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:20:53,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670534796] [2021-05-02 23:20:53,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:20:53,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:20:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:53,523 INFO L87 Difference]: Start difference. First operand 447 states and 448 transitions. Second operand has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:56,740 INFO L93 Difference]: Finished difference Result 677 states and 680 transitions. [2021-05-02 23:20:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:20:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 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 446 [2021-05-02 23:20:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:56,742 INFO L225 Difference]: With dead ends: 677 [2021-05-02 23:20:56,742 INFO L226 Difference]: Without dead ends: 453 [2021-05-02 23:20:56,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5843.5ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-02 23:20:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2021-05-02 23:20:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 446 states have (on average 1.0044843049327354) internal successors, (448), 446 states have internal predecessors, (448), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2021-05-02 23:20:56,748 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 446 [2021-05-02 23:20:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:56,748 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2021-05-02 23:20:56,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2021-05-02 23:20:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-05-02 23:20:56,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:56,749 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:56,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:20:56,750 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash 422545224, now seen corresponding path program 109 times [2021-05-02 23:20:56,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:56,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000615534] [2021-05-02 23:20:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:56,755 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:56,756 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:02,623 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:02,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000615534] [2021-05-02 23:21:02,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000615534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:02,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:02,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:21:02,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911828011] [2021-05-02 23:21:02,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:21:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:21:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:21:02,625 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:04,418 INFO L93 Difference]: Finished difference Result 683 states and 686 transitions. [2021-05-02 23:21:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:21:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 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 450 [2021-05-02 23:21:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:04,420 INFO L225 Difference]: With dead ends: 683 [2021-05-02 23:21:04,420 INFO L226 Difference]: Without dead ends: 457 [2021-05-02 23:21:04,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5634.8ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:21:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-02 23:21:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 455. [2021-05-02 23:21:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.0044444444444445) internal successors, (452), 450 states have internal predecessors, (452), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 456 transitions. [2021-05-02 23:21:04,428 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 456 transitions. Word has length 450 [2021-05-02 23:21:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:04,429 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 456 transitions. [2021-05-02 23:21:04,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 456 transitions. [2021-05-02 23:21:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-05-02 23:21:04,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:04,431 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:04,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:21:04,431 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1584436812, now seen corresponding path program 110 times [2021-05-02 23:21:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:04,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988389729] [2021-05-02 23:21:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:04,439 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:04,440 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:10,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:10,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988389729] [2021-05-02 23:21:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988389729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:10,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:21:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044705422] [2021-05-02 23:21:10,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:21:10,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:21:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:10,600 INFO L87 Difference]: Start difference. First operand 455 states and 456 transitions. Second operand has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:12,454 INFO L93 Difference]: Finished difference Result 689 states and 692 transitions. [2021-05-02 23:21:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:21:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 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 454 [2021-05-02 23:21:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:12,456 INFO L225 Difference]: With dead ends: 689 [2021-05-02 23:21:12,456 INFO L226 Difference]: Without dead ends: 461 [2021-05-02 23:21:12,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 5899.2ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-02 23:21:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2021-05-02 23:21:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 454 states have (on average 1.0044052863436124) internal successors, (456), 454 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 460 transitions. [2021-05-02 23:21:12,465 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 460 transitions. Word has length 454 [2021-05-02 23:21:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:12,465 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 460 transitions. [2021-05-02 23:21:12,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 460 transitions. [2021-05-02 23:21:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-05-02 23:21:12,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:12,467 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:12,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:21:12,467 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1647285072, now seen corresponding path program 111 times [2021-05-02 23:21:12,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:12,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129350519] [2021-05-02 23:21:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:12,475 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:12,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:18,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:18,882 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129350519] [2021-05-02 23:21:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [129350519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:21:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462449293] [2021-05-02 23:21:18,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:21:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:21:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:21:18,884 INFO L87 Difference]: Start difference. First operand 459 states and 460 transitions. Second operand has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:21,744 INFO L93 Difference]: Finished difference Result 695 states and 698 transitions. [2021-05-02 23:21:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:21:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 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 458 [2021-05-02 23:21:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:21,746 INFO L225 Difference]: With dead ends: 695 [2021-05-02 23:21:21,746 INFO L226 Difference]: Without dead ends: 465 [2021-05-02 23:21:21,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6154.0ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:21:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-02 23:21:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 463. [2021-05-02 23:21:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 458 states have (on average 1.0043668122270741) internal successors, (460), 458 states have internal predecessors, (460), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 464 transitions. [2021-05-02 23:21:21,755 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 464 transitions. Word has length 458 [2021-05-02 23:21:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:21,755 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 464 transitions. [2021-05-02 23:21:21,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 464 transitions. [2021-05-02 23:21:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-05-02 23:21:21,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:21,757 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:21,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:21:21,757 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1925283412, now seen corresponding path program 112 times [2021-05-02 23:21:21,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:21,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881834147] [2021-05-02 23:21:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:21,770 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:21,772 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:29,176 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:29,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881834147] [2021-05-02 23:21:29,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881834147] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:29,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:29,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:21:29,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943734787] [2021-05-02 23:21:29,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:21:29,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:29,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:21:29,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:21:29,178 INFO L87 Difference]: Start difference. First operand 463 states and 464 transitions. Second operand has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:31,756 INFO L93 Difference]: Finished difference Result 701 states and 704 transitions. [2021-05-02 23:21:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:21:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 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 462 [2021-05-02 23:21:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:31,757 INFO L225 Difference]: With dead ends: 701 [2021-05-02 23:21:31,757 INFO L226 Difference]: Without dead ends: 469 [2021-05-02 23:21:31,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 7109.3ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:21:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-02 23:21:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2021-05-02 23:21:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 462 states have (on average 1.0043290043290043) internal successors, (464), 462 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 468 transitions. [2021-05-02 23:21:31,763 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 468 transitions. Word has length 462 [2021-05-02 23:21:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:31,763 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 468 transitions. [2021-05-02 23:21:31,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 468 transitions. [2021-05-02 23:21:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-05-02 23:21:31,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:31,765 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:31,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:21:31,765 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash -587507880, now seen corresponding path program 113 times [2021-05-02 23:21:31,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:31,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065889008] [2021-05-02 23:21:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:31,770 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:31,771 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:38,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:38,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:38,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065889008] [2021-05-02 23:21:38,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065889008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:38,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:38,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:21:38,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964745401] [2021-05-02 23:21:38,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:21:38,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:21:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:21:38,374 INFO L87 Difference]: Start difference. First operand 467 states and 468 transitions. Second operand has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:40,999 INFO L93 Difference]: Finished difference Result 707 states and 710 transitions. [2021-05-02 23:21:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:21:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 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 466 [2021-05-02 23:21:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:41,001 INFO L225 Difference]: With dead ends: 707 [2021-05-02 23:21:41,001 INFO L226 Difference]: Without dead ends: 473 [2021-05-02 23:21:41,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6359.9ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:21:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-02 23:21:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2021-05-02 23:21:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.0042918454935623) internal successors, (468), 466 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2021-05-02 23:21:41,008 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 466 [2021-05-02 23:21:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:41,008 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2021-05-02 23:21:41,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2021-05-02 23:21:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-05-02 23:21:41,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:41,009 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:41,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:21:41,009 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1815223900, now seen corresponding path program 114 times [2021-05-02 23:21:41,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:41,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372357069] [2021-05-02 23:21:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:41,015 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:41,015 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:51,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:51,300 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372357069] [2021-05-02 23:21:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372357069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:51,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:51,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:21:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509166674] [2021-05-02 23:21:51,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:21:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:21:51,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:21:51,303 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:53,101 INFO L93 Difference]: Finished difference Result 713 states and 716 transitions. [2021-05-02 23:21:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:21:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 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 470 [2021-05-02 23:21:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:53,103 INFO L225 Difference]: With dead ends: 713 [2021-05-02 23:21:53,103 INFO L226 Difference]: Without dead ends: 477 [2021-05-02 23:21:53,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 10033.4ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:21:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-05-02 23:21:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 475. [2021-05-02 23:21:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2021-05-02 23:21:53,109 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 470 [2021-05-02 23:21:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:53,109 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2021-05-02 23:21:53,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2021-05-02 23:21:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-05-02 23:21:53,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:53,111 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:53,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:21:53,111 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash -365243552, now seen corresponding path program 115 times [2021-05-02 23:21:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:53,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477695412] [2021-05-02 23:21:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:53,117 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:53,117 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:59,648 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:59,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477695412] [2021-05-02 23:21:59,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477695412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:59,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:59,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:21:59,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884728768] [2021-05-02 23:21:59,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:21:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:21:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:21:59,650 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:01,863 INFO L93 Difference]: Finished difference Result 719 states and 722 transitions. [2021-05-02 23:22:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:22:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 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 474 [2021-05-02 23:22:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:01,864 INFO L225 Difference]: With dead ends: 719 [2021-05-02 23:22:01,864 INFO L226 Difference]: Without dead ends: 481 [2021-05-02 23:22:01,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 6301.5ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:22:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-02 23:22:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2021-05-02 23:22:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 474 states have (on average 1.0042194092827004) internal successors, (476), 474 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 480 transitions. [2021-05-02 23:22:01,870 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 480 transitions. Word has length 474 [2021-05-02 23:22:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:01,870 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 480 transitions. [2021-05-02 23:22:01,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 480 transitions. [2021-05-02 23:22:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-05-02 23:22:01,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:01,872 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:01,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:22:01,872 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1620412828, now seen corresponding path program 116 times [2021-05-02 23:22:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440672649] [2021-05-02 23:22:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:01,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:01,877 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:08,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440672649] [2021-05-02 23:22:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [440672649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:08,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:08,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:22:08,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268791555] [2021-05-02 23:22:08,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:22:08,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:22:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:22:08,680 INFO L87 Difference]: Start difference. First operand 479 states and 480 transitions. Second operand has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:11,389 INFO L93 Difference]: Finished difference Result 725 states and 728 transitions. [2021-05-02 23:22:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:22:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 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 478 [2021-05-02 23:22:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:11,391 INFO L225 Difference]: With dead ends: 725 [2021-05-02 23:22:11,391 INFO L226 Difference]: Without dead ends: 485 [2021-05-02 23:22:11,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 6580.0ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:22:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-05-02 23:22:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 483. [2021-05-02 23:22:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.00418410041841) internal successors, (480), 478 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 484 transitions. [2021-05-02 23:22:11,398 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 484 transitions. Word has length 478 [2021-05-02 23:22:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:11,398 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 484 transitions. [2021-05-02 23:22:11,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 484 transitions. [2021-05-02 23:22:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-05-02 23:22:11,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:11,400 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:11,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:22:11,400 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash -761919640, now seen corresponding path program 117 times [2021-05-02 23:22:11,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:11,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414586424] [2021-05-02 23:22:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:11,406 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:11,407 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:18,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:18,170 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414586424] [2021-05-02 23:22:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [414586424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:18,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:18,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:22:18,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047072046] [2021-05-02 23:22:18,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:22:18,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:22:18,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:22:18,173 INFO L87 Difference]: Start difference. First operand 483 states and 484 transitions. Second operand has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:22,765 INFO L93 Difference]: Finished difference Result 731 states and 734 transitions. [2021-05-02 23:22:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:22:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 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 482 [2021-05-02 23:22:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:22,769 INFO L225 Difference]: With dead ends: 731 [2021-05-02 23:22:22,769 INFO L226 Difference]: Without dead ends: 489 [2021-05-02 23:22:22,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6540.8ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:22:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-02 23:22:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2021-05-02 23:22:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 482 states have (on average 1.004149377593361) internal successors, (484), 482 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 488 transitions. [2021-05-02 23:22:22,791 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 488 transitions. Word has length 482 [2021-05-02 23:22:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:22,792 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 488 transitions. [2021-05-02 23:22:22,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 488 transitions. [2021-05-02 23:22:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-05-02 23:22:22,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:22,796 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:22,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:22:22,796 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1225950828, now seen corresponding path program 118 times [2021-05-02 23:22:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:22,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014127145] [2021-05-02 23:22:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:22,818 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:22,819 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:31,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:31,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014127145] [2021-05-02 23:22:31,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014127145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:31,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:31,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:22:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028091276] [2021-05-02 23:22:31,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:22:31,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:22:31,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:22:31,373 INFO L87 Difference]: Start difference. First operand 487 states and 488 transitions. Second operand has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:33,743 INFO L93 Difference]: Finished difference Result 737 states and 740 transitions. [2021-05-02 23:22:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:22:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 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 486 [2021-05-02 23:22:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:33,745 INFO L225 Difference]: With dead ends: 737 [2021-05-02 23:22:33,745 INFO L226 Difference]: Without dead ends: 493 [2021-05-02 23:22:33,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 8148.1ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:22:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-02 23:22:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 491. [2021-05-02 23:22:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 486 states have (on average 1.0041152263374487) internal successors, (488), 486 states have internal predecessors, (488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 492 transitions. [2021-05-02 23:22:33,752 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 492 transitions. Word has length 486 [2021-05-02 23:22:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:33,752 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 492 transitions. [2021-05-02 23:22:33,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 492 transitions. [2021-05-02 23:22:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-05-02 23:22:33,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:33,754 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:33,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:22:33,754 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash -961219728, now seen corresponding path program 119 times [2021-05-02 23:22:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:33,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715381999] [2021-05-02 23:22:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:33,760 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:33,761 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:43,827 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 23:22:43,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:43,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715381999] [2021-05-02 23:22:43,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [715381999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:43,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:43,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:22:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077221337] [2021-05-02 23:22:43,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:22:43,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:22:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:22:43,832 INFO L87 Difference]: Start difference. First operand 491 states and 492 transitions. Second operand has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:48,354 INFO L93 Difference]: Finished difference Result 743 states and 746 transitions. [2021-05-02 23:22:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:22:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 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 490 [2021-05-02 23:22:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:48,359 INFO L225 Difference]: With dead ends: 743 [2021-05-02 23:22:48,359 INFO L226 Difference]: Without dead ends: 497 [2021-05-02 23:22:48,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 9802.5ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:22:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-05-02 23:22:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 495. [2021-05-02 23:22:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.0040816326530613) internal successors, (492), 490 states have internal predecessors, (492), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 496 transitions. [2021-05-02 23:22:48,367 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 496 transitions. Word has length 490 [2021-05-02 23:22:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:48,367 INFO L480 AbstractCegarLoop]: Abstraction has 495 states and 496 transitions. [2021-05-02 23:22:48,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 496 transitions. [2021-05-02 23:22:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-05-02 23:22:48,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:48,369 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:48,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:22:48,369 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1915597196, now seen corresponding path program 120 times [2021-05-02 23:22:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:48,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217291254] [2021-05-02 23:22:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:48,382 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:48,383 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:55,806 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 23:22:55,806 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217291254] [2021-05-02 23:22:55,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [217291254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:55,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:55,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:22:55,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257815481] [2021-05-02 23:22:55,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:22:55,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:22:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:22:55,810 INFO L87 Difference]: Start difference. First operand 495 states and 496 transitions. Second operand has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:58,801 INFO L93 Difference]: Finished difference Result 749 states and 752 transitions. [2021-05-02 23:22:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:22:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 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 494 [2021-05-02 23:22:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:58,803 INFO L225 Difference]: With dead ends: 749 [2021-05-02 23:22:58,803 INFO L226 Difference]: Without dead ends: 501 [2021-05-02 23:22:58,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 7155.8ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:22:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-02 23:22:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2021-05-02 23:22:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 494 states have (on average 1.0040485829959513) internal successors, (496), 494 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 500 transitions. [2021-05-02 23:22:58,810 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 500 transitions. Word has length 494 [2021-05-02 23:22:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:58,810 INFO L480 AbstractCegarLoop]: Abstraction has 499 states and 500 transitions. [2021-05-02 23:22:58,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 500 transitions. [2021-05-02 23:22:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-05-02 23:22:58,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:58,812 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:58,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:22:58,813 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -549480584, now seen corresponding path program 121 times [2021-05-02 23:22:58,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:58,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109832588] [2021-05-02 23:22:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:58,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:58,822 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:09,331 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109832588] [2021-05-02 23:23:09,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109832588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:09,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:09,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:23:09,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184565457] [2021-05-02 23:23:09,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:23:09,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:23:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:23:09,334 INFO L87 Difference]: Start difference. First operand 499 states and 500 transitions. Second operand has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:11,424 INFO L93 Difference]: Finished difference Result 755 states and 758 transitions. [2021-05-02 23:23:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:23:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 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 498 [2021-05-02 23:23:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:11,426 INFO L225 Difference]: With dead ends: 755 [2021-05-02 23:23:11,426 INFO L226 Difference]: Without dead ends: 505 [2021-05-02 23:23:11,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 10222.6ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:23:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-02 23:23:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2021-05-02 23:23:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 498 states have (on average 1.0040160642570282) internal successors, (500), 498 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 504 transitions. [2021-05-02 23:23:11,433 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 504 transitions. Word has length 498 [2021-05-02 23:23:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:11,433 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 504 transitions. [2021-05-02 23:23:11,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 504 transitions. [2021-05-02 23:23:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-05-02 23:23:11,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:11,435 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:11,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:23:11,435 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2052181628, now seen corresponding path program 122 times [2021-05-02 23:23:11,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:11,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078774352] [2021-05-02 23:23:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:11,441 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:11,442 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:19,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:19,263 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:19,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078774352] [2021-05-02 23:23:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078774352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:23:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941452911] [2021-05-02 23:23:19,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:23:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:23:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:23:19,266 INFO L87 Difference]: Start difference. First operand 503 states and 504 transitions. Second operand has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:22,627 INFO L93 Difference]: Finished difference Result 761 states and 764 transitions. [2021-05-02 23:23:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:23:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 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 502 [2021-05-02 23:23:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:22,629 INFO L225 Difference]: With dead ends: 761 [2021-05-02 23:23:22,629 INFO L226 Difference]: Without dead ends: 509 [2021-05-02 23:23:22,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 7523.7ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:23:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-02 23:23:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 507. [2021-05-02 23:23:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 502 states have (on average 1.00398406374502) internal successors, (504), 502 states have internal predecessors, (504), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 508 transitions. [2021-05-02 23:23:22,636 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 508 transitions. Word has length 502 [2021-05-02 23:23:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:22,637 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 508 transitions. [2021-05-02 23:23:22,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 508 transitions. [2021-05-02 23:23:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-05-02 23:23:22,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:22,639 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:22,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:23:22,639 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:22,639 INFO L82 PathProgramCache]: Analyzing trace with hash 484307840, now seen corresponding path program 123 times [2021-05-02 23:23:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:22,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216787507] [2021-05-02 23:23:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:22,656 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:22,657 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:44,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:44,342 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 23:23:44,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216787507] [2021-05-02 23:23:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [216787507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:44,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:44,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:23:44,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662047065] [2021-05-02 23:23:44,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:23:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:23:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:23:44,346 INFO L87 Difference]: Start difference. First operand 507 states and 508 transitions. Second operand has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:49,770 INFO L93 Difference]: Finished difference Result 767 states and 770 transitions. [2021-05-02 23:23:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:23:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 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 506 [2021-05-02 23:23:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:49,772 INFO L225 Difference]: With dead ends: 767 [2021-05-02 23:23:49,772 INFO L226 Difference]: Without dead ends: 513 [2021-05-02 23:23:49,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 21253.0ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:23:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-02 23:23:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2021-05-02 23:23:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 506 states have (on average 1.0039525691699605) internal successors, (508), 506 states have internal predecessors, (508), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 512 transitions. [2021-05-02 23:23:49,783 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 512 transitions. Word has length 506 [2021-05-02 23:23:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:49,783 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 512 transitions. [2021-05-02 23:23:49,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 512 transitions. [2021-05-02 23:23:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-05-02 23:23:49,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:49,785 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:49,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:23:49,786 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 54068868, now seen corresponding path program 124 times [2021-05-02 23:23:49,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:49,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566205556] [2021-05-02 23:23:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:49,812 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:49,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:13,477 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 23:24:13,477 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566205556] [2021-05-02 23:24:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [566205556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:13,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:13,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:24:13,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475644532] [2021-05-02 23:24:13,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:24:13,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:24:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:24:13,481 INFO L87 Difference]: Start difference. First operand 511 states and 512 transitions. Second operand has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:17,410 INFO L93 Difference]: Finished difference Result 773 states and 776 transitions. [2021-05-02 23:24:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:24:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 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 510 [2021-05-02 23:24:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:17,412 INFO L225 Difference]: With dead ends: 773 [2021-05-02 23:24:17,412 INFO L226 Difference]: Without dead ends: 517 [2021-05-02 23:24:17,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 23208.6ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:24:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-02 23:24:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 515. [2021-05-02 23:24:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.003921568627451) internal successors, (512), 510 states have internal predecessors, (512), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 516 transitions. [2021-05-02 23:24:17,423 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 516 transitions. Word has length 510 [2021-05-02 23:24:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:17,423 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 516 transitions. [2021-05-02 23:24:17,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 516 transitions. [2021-05-02 23:24:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-05-02 23:24:17,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:17,426 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:17,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:24:17,426 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1748502408, now seen corresponding path program 125 times [2021-05-02 23:24:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:17,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943501792] [2021-05-02 23:24:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:17,436 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:17,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:26,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:26,547 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:26,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943501792] [2021-05-02 23:24:26,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [943501792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:26,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:26,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:24:26,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153290893] [2021-05-02 23:24:26,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:24:26,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:24:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:24:26,551 INFO L87 Difference]: Start difference. First operand 515 states and 516 transitions. Second operand has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:30,163 INFO L93 Difference]: Finished difference Result 779 states and 782 transitions. [2021-05-02 23:24:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:24:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 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 514 [2021-05-02 23:24:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:30,165 INFO L225 Difference]: With dead ends: 779 [2021-05-02 23:24:30,165 INFO L226 Difference]: Without dead ends: 521 [2021-05-02 23:24:30,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 8763.5ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:24:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-02 23:24:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 519. [2021-05-02 23:24:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 514 states have (on average 1.0038910505836576) internal successors, (516), 514 states have internal predecessors, (516), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 520 transitions. [2021-05-02 23:24:30,173 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 520 transitions. Word has length 514 [2021-05-02 23:24:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:30,173 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 520 transitions. [2021-05-02 23:24:30,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 520 transitions. [2021-05-02 23:24:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-05-02 23:24:30,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:30,175 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:30,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:24:30,176 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash 87029388, now seen corresponding path program 126 times [2021-05-02 23:24:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:30,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84568881] [2021-05-02 23:24:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:30,184 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:30,185 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:38,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:38,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:38,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84568881] [2021-05-02 23:24:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [84568881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:24:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424511622] [2021-05-02 23:24:38,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:24:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:24:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:24:38,918 INFO L87 Difference]: Start difference. First operand 519 states and 520 transitions. Second operand has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:42,283 INFO L93 Difference]: Finished difference Result 785 states and 788 transitions. [2021-05-02 23:24:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:24:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 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 518 [2021-05-02 23:24:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:42,285 INFO L225 Difference]: With dead ends: 785 [2021-05-02 23:24:42,285 INFO L226 Difference]: Without dead ends: 525 [2021-05-02 23:24:42,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 8392.6ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:24:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-05-02 23:24:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 523. [2021-05-02 23:24:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.0038610038610039) internal successors, (520), 518 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 524 transitions. [2021-05-02 23:24:42,293 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 524 transitions. Word has length 518 [2021-05-02 23:24:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:42,293 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 524 transitions. [2021-05-02 23:24:42,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 524 transitions. [2021-05-02 23:24:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-05-02 23:24:42,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:42,295 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:42,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:24:42,295 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:42,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1846160496, now seen corresponding path program 127 times [2021-05-02 23:24:42,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:42,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747943381] [2021-05-02 23:24:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:42,301 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:42,302 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:51,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:51,313 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 23:24:51,313 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747943381] [2021-05-02 23:24:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747943381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:51,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:51,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:24:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305804193] [2021-05-02 23:24:51,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:24:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:24:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:24:51,316 INFO L87 Difference]: Start difference. First operand 523 states and 524 transitions. Second operand has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:57,045 INFO L93 Difference]: Finished difference Result 791 states and 794 transitions. [2021-05-02 23:24:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:24:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 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 522 [2021-05-02 23:24:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:57,050 INFO L225 Difference]: With dead ends: 791 [2021-05-02 23:24:57,050 INFO L226 Difference]: Without dead ends: 529 [2021-05-02 23:24:57,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 8727.9ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:24:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-05-02 23:24:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2021-05-02 23:24:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 522 states have (on average 1.003831417624521) internal successors, (524), 522 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 528 transitions. [2021-05-02 23:24:57,058 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 528 transitions. Word has length 522 [2021-05-02 23:24:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:57,058 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 528 transitions. [2021-05-02 23:24:57,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 528 transitions. [2021-05-02 23:24:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-05-02 23:24:57,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:57,060 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:57,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:24:57,060 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:57,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1155440276, now seen corresponding path program 128 times [2021-05-02 23:24:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:57,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548482217] [2021-05-02 23:24:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:57,075 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:57,076 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:18,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:18,455 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 23:25:18,455 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548482217] [2021-05-02 23:25:18,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548482217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:18,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:18,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:25:18,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6800055] [2021-05-02 23:25:18,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:25:18,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:18,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:25:18,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:25:18,458 INFO L87 Difference]: Start difference. First operand 527 states and 528 transitions. Second operand has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:22,593 INFO L93 Difference]: Finished difference Result 797 states and 800 transitions. [2021-05-02 23:25:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:25:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 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 526 [2021-05-02 23:25:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:22,595 INFO L225 Difference]: With dead ends: 797 [2021-05-02 23:25:22,595 INFO L226 Difference]: Without dead ends: 533 [2021-05-02 23:25:22,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 20914.6ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:25:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-02 23:25:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2021-05-02 23:25:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.0038022813688212) internal successors, (528), 526 states have internal predecessors, (528), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 532 transitions. [2021-05-02 23:25:22,603 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 532 transitions. Word has length 526 [2021-05-02 23:25:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:22,603 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 532 transitions. [2021-05-02 23:25:22,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 532 transitions. [2021-05-02 23:25:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-05-02 23:25:22,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:22,606 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:22,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:25:22,606 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1388271512, now seen corresponding path program 129 times [2021-05-02 23:25:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:22,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519094480] [2021-05-02 23:25:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:22,624 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:22,625 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:52,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:52,540 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 23:25:52,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519094480] [2021-05-02 23:25:52,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519094480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:52,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:52,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:25:52,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738176666] [2021-05-02 23:25:52,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:25:52,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:25:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:52,545 INFO L87 Difference]: Start difference. First operand 531 states and 532 transitions. Second operand has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:56,957 INFO L93 Difference]: Finished difference Result 803 states and 806 transitions. [2021-05-02 23:25:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:25:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 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 530 [2021-05-02 23:25:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:56,960 INFO L225 Difference]: With dead ends: 803 [2021-05-02 23:25:56,961 INFO L226 Difference]: Without dead ends: 537 [2021-05-02 23:25:56,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 29454.6ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-02 23:25:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 535. [2021-05-02 23:25:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.0037735849056604) internal successors, (532), 530 states have internal predecessors, (532), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 536 transitions. [2021-05-02 23:25:56,973 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 536 transitions. Word has length 530 [2021-05-02 23:25:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:56,973 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 536 transitions. [2021-05-02 23:25:56,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 536 transitions. [2021-05-02 23:25:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-05-02 23:25:56,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:56,976 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:56,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:25:56,976 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1861025436, now seen corresponding path program 130 times [2021-05-02 23:25:56,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:56,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152374044] [2021-05-02 23:25:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:56,985 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:56,987 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:08,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:08,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152374044] [2021-05-02 23:26:08,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152374044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:08,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:08,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:26:08,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49346108] [2021-05-02 23:26:08,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:26:08,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:26:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:26:08,579 INFO L87 Difference]: Start difference. First operand 535 states and 536 transitions. Second operand has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:14,053 INFO L93 Difference]: Finished difference Result 809 states and 812 transitions. [2021-05-02 23:26:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:26:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 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 534 [2021-05-02 23:26:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:14,056 INFO L225 Difference]: With dead ends: 809 [2021-05-02 23:26:14,056 INFO L226 Difference]: Without dead ends: 541 [2021-05-02 23:26:14,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 11146.3ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:26:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-05-02 23:26:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-05-02 23:26:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.00374531835206) internal successors, (536), 534 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2021-05-02 23:26:14,068 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 534 [2021-05-02 23:26:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:14,068 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2021-05-02 23:26:14,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2021-05-02 23:26:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-05-02 23:26:14,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:14,071 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:14,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:26:14,072 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1262261152, now seen corresponding path program 131 times [2021-05-02 23:26:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:14,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508120522] [2021-05-02 23:26:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:14,080 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:14,082 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:43,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:43,854 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 23:26:43,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:43,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508120522] [2021-05-02 23:26:43,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508120522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:43,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:43,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:26:43,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437189602] [2021-05-02 23:26:43,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:26:43,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:43,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:26:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:26:43,860 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:48,925 INFO L93 Difference]: Finished difference Result 815 states and 818 transitions. [2021-05-02 23:26:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:26:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 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 538 [2021-05-02 23:26:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:48,928 INFO L225 Difference]: With dead ends: 815 [2021-05-02 23:26:48,928 INFO L226 Difference]: Without dead ends: 545 [2021-05-02 23:26:48,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 29272.1ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:26:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-02 23:26:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 543. [2021-05-02 23:26:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.003717472118959) internal successors, (540), 538 states have internal predecessors, (540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 544 transitions. [2021-05-02 23:26:48,936 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 544 transitions. Word has length 538 [2021-05-02 23:26:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:48,936 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 544 transitions. [2021-05-02 23:26:48,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 544 transitions. [2021-05-02 23:26:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-05-02 23:26:48,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:48,939 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:48,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:26:48,939 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 402855588, now seen corresponding path program 132 times [2021-05-02 23:26:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:48,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911302713] [2021-05-02 23:26:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:48,974 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:48,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:29,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:29,033 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911302713] [2021-05-02 23:27:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911302713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:29,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:29,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:27:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671664152] [2021-05-02 23:27:29,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:27:29,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:27:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:27:29,037 INFO L87 Difference]: Start difference. First operand 543 states and 544 transitions. Second operand has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:38,113 INFO L93 Difference]: Finished difference Result 821 states and 824 transitions. [2021-05-02 23:27:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:27:38,123 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 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 542 [2021-05-02 23:27:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:38,125 INFO L225 Difference]: With dead ends: 821 [2021-05-02 23:27:38,125 INFO L226 Difference]: Without dead ends: 549 [2021-05-02 23:27:38,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 39369.3ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:27:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-02 23:27:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 547. [2021-05-02 23:27:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 542 states have (on average 1.003690036900369) internal successors, (544), 542 states have internal predecessors, (544), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 548 transitions. [2021-05-02 23:27:38,145 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 548 transitions. Word has length 542 [2021-05-02 23:27:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:38,145 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 548 transitions. [2021-05-02 23:27:38,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 548 transitions. [2021-05-02 23:27:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-05-02 23:27:38,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:38,148 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:38,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:27:38,148 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 68519848, now seen corresponding path program 133 times [2021-05-02 23:27:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195548042] [2021-05-02 23:27:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:38,163 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:38,167 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:53,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:53,453 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:53,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195548042] [2021-05-02 23:27:53,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [195548042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:53,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:53,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-02 23:27:53,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965007382] [2021-05-02 23:27:53,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 23:27:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 23:27:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:27:53,457 INFO L87 Difference]: Start difference. First operand 547 states and 548 transitions. Second operand has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:01,324 INFO L93 Difference]: Finished difference Result 827 states and 830 transitions. [2021-05-02 23:28:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-02 23:28:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 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 546 [2021-05-02 23:28:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:01,327 INFO L225 Difference]: With dead ends: 827 [2021-05-02 23:28:01,327 INFO L226 Difference]: Without dead ends: 553 [2021-05-02 23:28:01,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 14767.9ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:28:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-02 23:28:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 551. [2021-05-02 23:28:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 546 states have (on average 1.0036630036630036) internal successors, (548), 546 states have internal predecessors, (548), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 552 transitions. [2021-05-02 23:28:01,336 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 552 transitions. Word has length 546 [2021-05-02 23:28:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:01,336 INFO L480 AbstractCegarLoop]: Abstraction has 551 states and 552 transitions. [2021-05-02 23:28:01,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 552 transitions. [2021-05-02 23:28:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-05-02 23:28:01,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:01,338 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:01,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:28:01,338 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1127684436, now seen corresponding path program 134 times [2021-05-02 23:28:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:01,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477740780] [2021-05-02 23:28:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:01,347 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:01,349 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:13,886 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:13,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477740780] [2021-05-02 23:28:13,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [477740780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:13,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:13,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-02 23:28:13,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212806303] [2021-05-02 23:28:13,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 23:28:13,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 23:28:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:28:13,889 INFO L87 Difference]: Start difference. First operand 551 states and 552 transitions. Second operand has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:19,568 INFO L93 Difference]: Finished difference Result 833 states and 836 transitions. [2021-05-02 23:28:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 23:28:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 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 550 [2021-05-02 23:28:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:19,573 INFO L225 Difference]: With dead ends: 833 [2021-05-02 23:28:19,573 INFO L226 Difference]: Without dead ends: 557 [2021-05-02 23:28:19,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 12119.2ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:28:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-05-02 23:28:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 555. [2021-05-02 23:28:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.0036363636363637) internal successors, (552), 550 states have internal predecessors, (552), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 556 transitions. [2021-05-02 23:28:19,581 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 556 transitions. Word has length 550 [2021-05-02 23:28:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:19,582 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 556 transitions. [2021-05-02 23:28:19,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 556 transitions. [2021-05-02 23:28:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-05-02 23:28:19,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:19,584 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:19,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:28:19,584 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:19,585 INFO L82 PathProgramCache]: Analyzing trace with hash -302894160, now seen corresponding path program 135 times [2021-05-02 23:28:19,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:19,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490187150] [2021-05-02 23:28:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:19,591 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:19,592 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:33,311 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:33,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490187150] [2021-05-02 23:28:33,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [490187150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:33,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:33,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-02 23:28:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394593024] [2021-05-02 23:28:33,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 23:28:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 23:28:33,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:33,314 INFO L87 Difference]: Start difference. First operand 555 states and 556 transitions. Second operand has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:38,052 INFO L93 Difference]: Finished difference Result 839 states and 842 transitions. [2021-05-02 23:28:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-02 23:28:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 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 554 [2021-05-02 23:28:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:38,055 INFO L225 Difference]: With dead ends: 839 [2021-05-02 23:28:38,055 INFO L226 Difference]: Without dead ends: 561 [2021-05-02 23:28:38,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 13391.8ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-05-02 23:28:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 559. [2021-05-02 23:28:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.0036101083032491) internal successors, (556), 554 states have internal predecessors, (556), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 560 transitions. [2021-05-02 23:28:38,072 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 560 transitions. Word has length 554 [2021-05-02 23:28:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:38,072 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 560 transitions. [2021-05-02 23:28:38,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 560 transitions. [2021-05-02 23:28:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-05-02 23:28:38,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:38,076 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:38,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:28:38,076 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1041862988, now seen corresponding path program 136 times [2021-05-02 23:28:38,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:38,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37822853] [2021-05-02 23:28:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:38,084 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:38,085 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:50,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:50,183 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:50,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37822853] [2021-05-02 23:28:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [37822853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:50,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:50,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-02 23:28:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255075803] [2021-05-02 23:28:50,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 23:28:50,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 23:28:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:28:50,186 INFO L87 Difference]: Start difference. First operand 559 states and 560 transitions. Second operand has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:54,904 INFO L93 Difference]: Finished difference Result 845 states and 848 transitions. [2021-05-02 23:28:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 23:28:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 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 558 [2021-05-02 23:28:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:54,907 INFO L225 Difference]: With dead ends: 845 [2021-05-02 23:28:54,907 INFO L226 Difference]: Without dead ends: 565 [2021-05-02 23:28:54,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 11634.7ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:28:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-02 23:28:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-05-02 23:28:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.003584229390681) internal successors, (560), 558 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 564 transitions. [2021-05-02 23:28:54,914 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 564 transitions. Word has length 558 [2021-05-02 23:28:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:54,921 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 564 transitions. [2021-05-02 23:28:54,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 564 transitions. [2021-05-02 23:28:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-05-02 23:28:54,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:54,923 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:54,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:28:54,923 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1635424184, now seen corresponding path program 137 times [2021-05-02 23:28:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:54,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812931364] [2021-05-02 23:28:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:54,932 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:54,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:09,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:09,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812931364] [2021-05-02 23:29:09,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812931364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:09,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:09,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-02 23:29:09,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909940239] [2021-05-02 23:29:09,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 23:29:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 23:29:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:29:09,972 INFO L87 Difference]: Start difference. First operand 563 states and 564 transitions. Second operand has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:14,650 INFO L93 Difference]: Finished difference Result 851 states and 854 transitions. [2021-05-02 23:29:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 23:29:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 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 562 [2021-05-02 23:29:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:14,652 INFO L225 Difference]: With dead ends: 851 [2021-05-02 23:29:14,652 INFO L226 Difference]: Without dead ends: 569 [2021-05-02 23:29:14,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 14605.3ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:29:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-02 23:29:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2021-05-02 23:29:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 562 states have (on average 1.00355871886121) internal successors, (564), 562 states have internal predecessors, (564), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 568 transitions. [2021-05-02 23:29:14,661 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 568 transitions. Word has length 562 [2021-05-02 23:29:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:14,661 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 568 transitions. [2021-05-02 23:29:14,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 568 transitions. [2021-05-02 23:29:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-05-02 23:29:14,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:14,663 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:14,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-02 23:29:14,663 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1946398396, now seen corresponding path program 138 times [2021-05-02 23:29:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:14,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618040218] [2021-05-02 23:29:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:14,671 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:14,672 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:28,275 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618040218] [2021-05-02 23:29:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618040218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:28,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:28,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-02 23:29:28,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146239369] [2021-05-02 23:29:28,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 23:29:28,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 23:29:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:29:28,278 INFO L87 Difference]: Start difference. First operand 567 states and 568 transitions. Second operand has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:33,481 INFO L93 Difference]: Finished difference Result 857 states and 860 transitions. [2021-05-02 23:29:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-02 23:29:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 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 566 [2021-05-02 23:29:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:33,484 INFO L225 Difference]: With dead ends: 857 [2021-05-02 23:29:33,484 INFO L226 Difference]: Without dead ends: 573 [2021-05-02 23:29:33,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 13276.2ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:29:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-02 23:29:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2021-05-02 23:29:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 566 states have (on average 1.0035335689045937) internal successors, (568), 566 states have internal predecessors, (568), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 572 transitions. [2021-05-02 23:29:33,491 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 572 transitions. Word has length 566 [2021-05-02 23:29:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:33,491 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 572 transitions. [2021-05-02 23:29:33,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 572 transitions. [2021-05-02 23:29:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-05-02 23:29:33,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:33,494 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:33,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-02 23:29:33,494 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1621707840, now seen corresponding path program 139 times [2021-05-02 23:29:33,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:33,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333700157] [2021-05-02 23:29:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:33,503 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:33,504 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:46,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:46,794 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333700157] [2021-05-02 23:29:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333700157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:46,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:46,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-02 23:29:46,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200751751] [2021-05-02 23:29:46,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-02 23:29:46,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-02 23:29:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:29:46,797 INFO L87 Difference]: Start difference. First operand 571 states and 572 transitions. Second operand has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:52,771 INFO L93 Difference]: Finished difference Result 863 states and 866 transitions. [2021-05-02 23:29:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-02 23:29:52,772 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 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 570 [2021-05-02 23:29:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:52,774 INFO L225 Difference]: With dead ends: 863 [2021-05-02 23:29:52,774 INFO L226 Difference]: Without dead ends: 577 [2021-05-02 23:29:52,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12964.9ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:29:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-02 23:29:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-05-02 23:29:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.0035087719298246) internal successors, (572), 570 states have internal predecessors, (572), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 576 transitions. [2021-05-02 23:29:52,783 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 576 transitions. Word has length 570 [2021-05-02 23:29:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:52,784 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 576 transitions. [2021-05-02 23:29:52,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 576 transitions. [2021-05-02 23:29:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-05-02 23:29:52,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:52,786 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:52,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-02 23:29:52,787 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash 130590404, now seen corresponding path program 140 times [2021-05-02 23:29:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:52,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751472952] [2021-05-02 23:29:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:52,800 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:52,801 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:07,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:07,490 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 23:30:07,490 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:07,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751472952] [2021-05-02 23:30:07,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751472952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:07,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:07,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-02 23:30:07,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448186816] [2021-05-02 23:30:07,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 23:30:07,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 23:30:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:30:07,494 INFO L87 Difference]: Start difference. First operand 575 states and 576 transitions. Second operand has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:15,816 INFO L93 Difference]: Finished difference Result 869 states and 872 transitions. [2021-05-02 23:30:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-02 23:30:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 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 574 [2021-05-02 23:30:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:15,818 INFO L225 Difference]: With dead ends: 869 [2021-05-02 23:30:15,818 INFO L226 Difference]: Without dead ends: 581 [2021-05-02 23:30:15,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 14290.6ms TimeCoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:30:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-05-02 23:30:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2021-05-02 23:30:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 574 states have (on average 1.0034843205574913) internal successors, (576), 574 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 580 transitions. [2021-05-02 23:30:15,825 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 580 transitions. Word has length 574 [2021-05-02 23:30:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:15,825 INFO L480 AbstractCegarLoop]: Abstraction has 579 states and 580 transitions. [2021-05-02 23:30:15,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 143 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 580 transitions. [2021-05-02 23:30:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-05-02 23:30:15,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:15,827 INFO L523 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:15,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-02 23:30:15,827 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash -802256952, now seen corresponding path program 141 times [2021-05-02 23:30:15,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:15,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219947878] [2021-05-02 23:30:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:15,851 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:15,852 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:32,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:32,133 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 23:30:32,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:32,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219947878] [2021-05-02 23:30:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [219947878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:32,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2021-05-02 23:30:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799150661] [2021-05-02 23:30:32,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2021-05-02 23:30:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-05-02 23:30:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:30:32,136 INFO L87 Difference]: Start difference. First operand 579 states and 580 transitions. Second operand has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:38,885 INFO L93 Difference]: Finished difference Result 875 states and 878 transitions. [2021-05-02 23:30:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-02 23:30:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 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 578 [2021-05-02 23:30:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:38,888 INFO L225 Difference]: With dead ends: 875 [2021-05-02 23:30:38,888 INFO L226 Difference]: Without dead ends: 585 [2021-05-02 23:30:38,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 15925.9ms TimeCoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:30:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-02 23:30:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2021-05-02 23:30:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 578 states have (on average 1.0034602076124568) internal successors, (580), 578 states have internal predecessors, (580), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 584 transitions. [2021-05-02 23:30:38,895 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 584 transitions. Word has length 578 [2021-05-02 23:30:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:38,895 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 584 transitions. [2021-05-02 23:30:38,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 145 states, 145 states have (on average 2.027586206896552) internal successors, (294), 144 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 584 transitions. [2021-05-02 23:30:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-05-02 23:30:38,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:38,897 INFO L523 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:38,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:30:38,898 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1713547572, now seen corresponding path program 142 times [2021-05-02 23:30:38,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:38,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580209113] [2021-05-02 23:30:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:38,927 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:38,927 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat