/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:02:11,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:02:11,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:02:11,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:02:11,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:02:11,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:02:11,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:02:11,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:02:11,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:02:11,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:02:11,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:02:11,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:02:11,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:02:11,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:02:11,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:02:11,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:02:11,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:02:11,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:02:11,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:02:11,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:02:11,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:02:11,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:02:11,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:02:11,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:02:11,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:02:11,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:02:11,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:02:11,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:02:11,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:02:11,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:02:11,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:02:11,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:02:11,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:02:11,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:02:11,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:02:11,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:02:11,869 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:02:11,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:02:11,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:02:11,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:02:11,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:02:11,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:02:11,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:02:11,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:02:12,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:02:12,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:02:12,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:02:12,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:02:12,326 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:02:12,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-23 22:02:12,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9eabd16/b34bf001ab274472b7d3c7d45bbf2953/FLAG9c9cbb676 [2020-10-23 22:02:13,103 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:02:13,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-23 22:02:13,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9eabd16/b34bf001ab274472b7d3c7d45bbf2953/FLAG9c9cbb676 [2020-10-23 22:02:13,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d9eabd16/b34bf001ab274472b7d3c7d45bbf2953 [2020-10-23 22:02:13,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:02:13,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:02:13,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:13,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:02:13,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:02:13,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9e0f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13, skipping insertion in model container [2020-10-23 22:02:13,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:02:13,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:02:13,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:13,717 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:02:13,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:13,750 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:02:13,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13 WrapperNode [2020-10-23 22:02:13,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:13,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:02:13,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:02:13,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:02:13,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (1/1) ... [2020-10-23 22:02:13,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:02:13,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:02:13,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:02:13,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:02:13,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (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 [2020-10-23 22:02:13,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:02:13,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:02:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:02:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:02:13,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:02:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:02:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:02:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:02:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:02:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:02:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:02:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:02:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:02:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:02:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:02:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:02:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:02:14,270 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:02:14,271 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:02:14,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:14 BoogieIcfgContainer [2020-10-23 22:02:14,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:02:14,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:02:14,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:02:14,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:02:14,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:02:13" (1/3) ... [2020-10-23 22:02:14,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eff845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:14, skipping insertion in model container [2020-10-23 22:02:14,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:13" (2/3) ... [2020-10-23 22:02:14,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eff845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:14, skipping insertion in model container [2020-10-23 22:02:14,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:14" (3/3) ... [2020-10-23 22:02:14,291 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-10-23 22:02:14,304 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:02:14,310 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:02:14,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:02:14,359 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:02:14,359 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:02:14,359 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:02:14,359 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:02:14,360 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:02:14,360 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:02:14,360 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:02:14,360 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:02:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 22:02:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 22:02:14,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:14,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:14,389 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash -901635656, now seen corresponding path program 1 times [2020-10-23 22:02:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:14,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087860450] [2020-10-23 22:02:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:14,487 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:14,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:14,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087860450] [2020-10-23 22:02:14,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:14,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:02:14,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877095784] [2020-10-23 22:02:14,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:02:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:02:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:02:14,747 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-23 22:02:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:14,867 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-23 22:02:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:02:14,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-23 22:02:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:14,878 INFO L225 Difference]: With dead ends: 50 [2020-10-23 22:02:14,878 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 22:02:14,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:02:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 22:02:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 22:02:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 22:02:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-23 22:02:14,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-23 22:02:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:14,932 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-23 22:02:14,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:02:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-23 22:02:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 22:02:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:14,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:14,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:02:14,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1302443770, now seen corresponding path program 1 times [2020-10-23 22:02:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:14,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145952018] [2020-10-23 22:02:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:14,940 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:15,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145952018] [2020-10-23 22:02:15,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:15,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:02:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591969311] [2020-10-23 22:02:15,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:02:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:02:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:02:15,127 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-10-23 22:02:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:15,347 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-23 22:02:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:02:15,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-23 22:02:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:15,349 INFO L225 Difference]: With dead ends: 39 [2020-10-23 22:02:15,349 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 22:02:15,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:02:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 22:02:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-23 22:02:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 22:02:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 22:02:15,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-10-23 22:02:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:15,365 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 22:02:15,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:02:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 22:02:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 22:02:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:15,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:15,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:02:15,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:15,368 INFO L82 PathProgramCache]: Analyzing trace with hash 642832942, now seen corresponding path program 1 times [2020-10-23 22:02:15,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:15,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203629234] [2020-10-23 22:02:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:16,041 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:16,057 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:16,060 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203629234] [2020-10-23 22:02:16,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:16,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:02:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786100918] [2020-10-23 22:02:16,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:02:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:02:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:02:16,173 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-10-23 22:02:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:16,279 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-23 22:02:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:02:16,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 22:02:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:16,281 INFO L225 Difference]: With dead ends: 48 [2020-10-23 22:02:16,282 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 22:02:16,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:02:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 22:02:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-23 22:02:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 22:02:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-23 22:02:16,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-23 22:02:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:16,296 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-23 22:02:16,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:02:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-23 22:02:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 22:02:16,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:16,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:16,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:02:16,299 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -466055855, now seen corresponding path program 1 times [2020-10-23 22:02:16,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:16,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435599875] [2020-10-23 22:02:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:17,216 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:02:17,947 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:18,698 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:19,288 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:19,949 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:20,661 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:20,666 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:20,668 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:20,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:20,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435599875] [2020-10-23 22:02:20,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:20,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:02:20,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524519411] [2020-10-23 22:02:20,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:02:20,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:02:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:02:20,837 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-10-23 22:02:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:21,105 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-23 22:02:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:02:21,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-23 22:02:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:21,108 INFO L225 Difference]: With dead ends: 53 [2020-10-23 22:02:21,108 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 22:02:21,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:02:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 22:02:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-23 22:02:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 22:02:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-23 22:02:21,131 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-10-23 22:02:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:21,131 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-23 22:02:21,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:02:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-23 22:02:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 22:02:21,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:21,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:21,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:02:21,139 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1843550222, now seen corresponding path program 2 times [2020-10-23 22:02:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:21,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881358977] [2020-10-23 22:02:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:22,773 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-23 22:02:23,433 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:24,122 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:24,801 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:25,411 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:25,949 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:26,537 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:27,156 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:27,713 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:27,716 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:27,717 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:27,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881358977] [2020-10-23 22:02:27,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:27,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:02:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420991223] [2020-10-23 22:02:27,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:02:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:02:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:02:27,893 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 8 states. [2020-10-23 22:02:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:28,309 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-23 22:02:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 22:02:28,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-23 22:02:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:28,311 INFO L225 Difference]: With dead ends: 58 [2020-10-23 22:02:28,311 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 22:02:28,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-23 22:02:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 22:02:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 22:02:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 22:02:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-23 22:02:28,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-23 22:02:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:28,326 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-23 22:02:28,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:02:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-23 22:02:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 22:02:28,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:28,328 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:28,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:02:28,328 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2068495217, now seen corresponding path program 3 times [2020-10-23 22:02:28,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:28,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854314455] [2020-10-23 22:02:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:29,491 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-10-23 22:02:30,138 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:30,835 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:31,555 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:32,128 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:32,671 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:33,268 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:33,858 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:34,404 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:34,407 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:34,411 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:34,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854314455] [2020-10-23 22:02:34,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:34,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 22:02:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170956769] [2020-10-23 22:02:34,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 22:02:34,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 22:02:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:02:34,685 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-23 22:02:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:35,284 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-23 22:02:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 22:02:35,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-23 22:02:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:35,285 INFO L225 Difference]: With dead ends: 63 [2020-10-23 22:02:35,286 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 22:02:35,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-23 22:02:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 22:02:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-23 22:02:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 22:02:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-23 22:02:35,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2020-10-23 22:02:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:35,316 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-23 22:02:35,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 22:02:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-23 22:02:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 22:02:35,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:35,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:35,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:02:35,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 664272366, now seen corresponding path program 4 times [2020-10-23 22:02:35,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:35,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388936927] [2020-10-23 22:02:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:36,308 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:02:36,939 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:37,666 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:38,383 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:38,974 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:39,517 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:40,138 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:40,725 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:41,273 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:41,275 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:41,276 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:41,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388936927] [2020-10-23 22:02:41,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:41,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 22:02:41,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289457750] [2020-10-23 22:02:41,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 22:02:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 22:02:41,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-23 22:02:41,582 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-10-23 22:02:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:42,421 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-23 22:02:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:02:42,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-23 22:02:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:42,427 INFO L225 Difference]: With dead ends: 68 [2020-10-23 22:02:42,427 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 22:02:42,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-23 22:02:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 22:02:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-23 22:02:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 22:02:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-23 22:02:42,451 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-23 22:02:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:42,452 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-23 22:02:42,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 22:02:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-23 22:02:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 22:02:42,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:42,463 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:42,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:02:42,464 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1735278191, now seen corresponding path program 5 times [2020-10-23 22:02:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:42,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689226719] [2020-10-23 22:02:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:44,078 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-10-23 22:02:44,723 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:45,443 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:46,149 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:46,782 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:47,315 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:47,914 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:48,500 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:49,036 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:49,037 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:49,039 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:49,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:49,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689226719] [2020-10-23 22:02:49,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:49,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 22:02:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841328578] [2020-10-23 22:02:49,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 22:02:49,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 22:02:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-23 22:02:49,354 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-23 22:02:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:50,458 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-23 22:02:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 22:02:50,463 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-23 22:02:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:50,464 INFO L225 Difference]: With dead ends: 73 [2020-10-23 22:02:50,464 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 22:02:50,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-23 22:02:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 22:02:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-23 22:02:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 22:02:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-23 22:02:50,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-23 22:02:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:50,478 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-23 22:02:50,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 22:02:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-23 22:02:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 22:02:50,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:50,479 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:50,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:02:50,480 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1302344754, now seen corresponding path program 6 times [2020-10-23 22:02:50,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:50,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127083851] [2020-10-23 22:02:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:52,184 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 157 DAG size of output: 119 [2020-10-23 22:02:52,819 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:53,566 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:54,287 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:02:54,911 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:02:55,458 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:56,090 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:56,720 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:02:57,261 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:02:57,262 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:57,264 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:57,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:02:57,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127083851] [2020-10-23 22:02:57,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:57,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 22:02:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46286833] [2020-10-23 22:02:57,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 22:02:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 22:02:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-23 22:02:57,677 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 16 states. [2020-10-23 22:02:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:59,021 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-23 22:02:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 22:02:59,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-23 22:02:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:59,023 INFO L225 Difference]: With dead ends: 78 [2020-10-23 22:02:59,023 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 22:02:59,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 22:02:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 22:02:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-23 22:02:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 22:02:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-23 22:02:59,057 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-23 22:02:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:59,057 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-23 22:02:59,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 22:02:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-23 22:02:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 22:02:59,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:59,058 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:59,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 22:02:59,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 31432625, now seen corresponding path program 7 times [2020-10-23 22:02:59,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:59,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507793284] [2020-10-23 22:02:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:00,084 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:03:00,729 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:01,461 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:02,175 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:02,800 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:03,359 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:03,977 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:04,615 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:05,182 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:05,183 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:05,185 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:05,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507793284] [2020-10-23 22:03:05,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:05,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 22:03:05,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883899345] [2020-10-23 22:03:05,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 22:03:05,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:05,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 22:03:05,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-23 22:03:05,611 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2020-10-23 22:03:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:07,272 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-23 22:03:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 22:03:07,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-23 22:03:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:07,276 INFO L225 Difference]: With dead ends: 83 [2020-10-23 22:03:07,276 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 22:03:07,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 22:03:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 22:03:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-23 22:03:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 22:03:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-23 22:03:07,299 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2020-10-23 22:03:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:07,299 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-23 22:03:07,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 22:03:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-23 22:03:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 22:03:07,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:07,300 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:07,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 22:03:07,301 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 463978926, now seen corresponding path program 8 times [2020-10-23 22:03:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:07,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620423647] [2020-10-23 22:03:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:08,983 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 159 DAG size of output: 117 [2020-10-23 22:03:09,636 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:10,392 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:11,130 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:11,783 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:12,338 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:12,992 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:13,590 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:14,144 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:14,145 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:14,147 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:14,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620423647] [2020-10-23 22:03:14,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:14,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 22:03:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636762180] [2020-10-23 22:03:14,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 22:03:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 22:03:14,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-23 22:03:14,669 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 20 states. [2020-10-23 22:03:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:16,655 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-23 22:03:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 22:03:16,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-23 22:03:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:16,657 INFO L225 Difference]: With dead ends: 88 [2020-10-23 22:03:16,657 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 22:03:16,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 22:03:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 22:03:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-23 22:03:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 22:03:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-23 22:03:16,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-23 22:03:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:16,698 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-23 22:03:16,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 22:03:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-23 22:03:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 22:03:16,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:16,699 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:16,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 22:03:16,700 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -561621551, now seen corresponding path program 9 times [2020-10-23 22:03:16,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:16,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507623666] [2020-10-23 22:03:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:17,524 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:03:18,183 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:18,899 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:19,588 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:20,238 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:20,799 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:21,455 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:22,101 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:22,655 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:22,656 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:22,658 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:23,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507623666] [2020-10-23 22:03:23,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:23,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 22:03:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831746850] [2020-10-23 22:03:23,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 22:03:23,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 22:03:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-23 22:03:23,294 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-10-23 22:03:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:25,606 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-23 22:03:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 22:03:25,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-23 22:03:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:25,608 INFO L225 Difference]: With dead ends: 93 [2020-10-23 22:03:25,609 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 22:03:25,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 22:03:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 22:03:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-23 22:03:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 22:03:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-23 22:03:25,626 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 72 [2020-10-23 22:03:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:25,626 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-23 22:03:25,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 22:03:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-23 22:03:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 22:03:25,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:25,628 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:25,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 22:03:25,628 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash -10625138, now seen corresponding path program 10 times [2020-10-23 22:03:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:25,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620254338] [2020-10-23 22:03:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:27,306 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 156 DAG size of output: 116 [2020-10-23 22:03:27,972 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:28,741 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:29,484 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:30,127 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:30,685 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:31,341 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:31,988 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:32,557 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:32,560 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:32,561 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:33,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620254338] [2020-10-23 22:03:33,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:33,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 22:03:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654300053] [2020-10-23 22:03:33,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 22:03:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:33,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 22:03:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-23 22:03:33,217 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-10-23 22:03:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:35,959 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-23 22:03:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 22:03:35,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-23 22:03:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:35,962 INFO L225 Difference]: With dead ends: 98 [2020-10-23 22:03:35,962 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 22:03:35,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 22:03:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 22:03:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-23 22:03:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 22:03:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-23 22:03:35,982 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-23 22:03:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:35,982 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-23 22:03:35,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 22:03:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-23 22:03:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 22:03:35,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:35,983 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:35,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 22:03:35,983 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash -682105871, now seen corresponding path program 11 times [2020-10-23 22:03:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903194299] [2020-10-23 22:03:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:37,682 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-10-23 22:03:38,334 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:39,060 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:39,772 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:40,426 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:41,001 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:41,614 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:42,277 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:42,844 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:42,846 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:42,847 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:43,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903194299] [2020-10-23 22:03:43,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:43,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 22:03:43,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433076643] [2020-10-23 22:03:43,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 22:03:43,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 22:03:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-23 22:03:43,624 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2020-10-23 22:03:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:46,817 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-23 22:03:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 22:03:46,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-10-23 22:03:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:46,819 INFO L225 Difference]: With dead ends: 103 [2020-10-23 22:03:46,819 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 22:03:46,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 22:03:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 22:03:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-23 22:03:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 22:03:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-23 22:03:46,839 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-10-23 22:03:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-23 22:03:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 22:03:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-23 22:03:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 22:03:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:46,842 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:46,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 22:03:46,842 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1743791470, now seen corresponding path program 12 times [2020-10-23 22:03:46,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:46,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519878211] [2020-10-23 22:03:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:48,522 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-10-23 22:03:49,199 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:49,943 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:50,701 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:03:51,369 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:03:51,946 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:52,572 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:53,239 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:03:53,836 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:03:53,839 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:53,840 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519878211] [2020-10-23 22:03:54,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:54,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 22:03:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339429092] [2020-10-23 22:03:54,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 22:03:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 22:03:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-23 22:03:54,686 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 28 states. [2020-10-23 22:03:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:58,328 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-10-23 22:03:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 22:03:58,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-10-23 22:03:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:58,331 INFO L225 Difference]: With dead ends: 108 [2020-10-23 22:03:58,331 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 22:03:58,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 22:03:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 22:03:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-23 22:03:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 22:03:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-23 22:03:58,348 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-23 22:03:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:58,349 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-23 22:03:58,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 22:03:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-23 22:03:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 22:03:58,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:58,350 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:58,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 22:03:58,350 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash 916867601, now seen corresponding path program 13 times [2020-10-23 22:03:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:58,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709121958] [2020-10-23 22:03:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:00,131 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-10-23 22:04:00,814 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:01,593 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:02,312 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:02,973 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:03,556 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:04,190 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:04,870 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:05,449 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:05,451 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:05,452 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:06,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:06,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709121958] [2020-10-23 22:04:06,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:06,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 22:04:06,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740316545] [2020-10-23 22:04:06,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 22:04:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 22:04:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-10-23 22:04:06,424 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 30 states. [2020-10-23 22:04:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:10,766 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-10-23 22:04:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 22:04:10,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-10-23 22:04:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:10,768 INFO L225 Difference]: With dead ends: 113 [2020-10-23 22:04:10,768 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 22:04:10,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 22:04:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 22:04:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-10-23 22:04:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 22:04:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-23 22:04:10,786 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2020-10-23 22:04:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:10,787 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-23 22:04:10,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 22:04:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-23 22:04:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 22:04:10,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:10,788 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:10,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 22:04:10,788 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713266, now seen corresponding path program 14 times [2020-10-23 22:04:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:10,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699966948] [2020-10-23 22:04:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:12,566 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 161 DAG size of output: 116 [2020-10-23 22:04:13,272 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:14,076 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:14,808 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:15,483 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:16,076 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:16,723 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:17,375 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:17,969 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:17,970 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:17,972 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:19,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:19,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699966948] [2020-10-23 22:04:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 22:04:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565213687] [2020-10-23 22:04:19,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 22:04:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 22:04:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-23 22:04:19,127 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 32 states. [2020-10-23 22:04:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:23,850 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-23 22:04:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 22:04:23,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-10-23 22:04:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:23,852 INFO L225 Difference]: With dead ends: 118 [2020-10-23 22:04:23,852 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 22:04:23,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 22:04:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 22:04:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-23 22:04:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-23 22:04:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-23 22:04:23,870 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-23 22:04:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-23 22:04:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 22:04:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-23 22:04:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 22:04:23,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:23,871 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:23,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 22:04:23,872 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 138643505, now seen corresponding path program 15 times [2020-10-23 22:04:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:23,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493948995] [2020-10-23 22:04:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:24,774 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:04:25,480 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:26,237 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:27,031 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:27,713 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:28,315 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:29,011 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:29,665 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:30,259 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:30,260 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:30,261 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:31,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493948995] [2020-10-23 22:04:31,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:31,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 22:04:31,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042648428] [2020-10-23 22:04:31,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 22:04:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 22:04:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 22:04:31,514 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 34 states. [2020-10-23 22:04:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:36,880 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-10-23 22:04:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 22:04:36,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-10-23 22:04:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:36,882 INFO L225 Difference]: With dead ends: 123 [2020-10-23 22:04:36,883 INFO L226 Difference]: Without dead ends: 111 [2020-10-23 22:04:36,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 22:04:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-23 22:04:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-23 22:04:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-23 22:04:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-23 22:04:36,901 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 102 [2020-10-23 22:04:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:36,901 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-23 22:04:36,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 22:04:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-23 22:04:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-23 22:04:36,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:36,902 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:36,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 22:04:36,902 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1507928366, now seen corresponding path program 16 times [2020-10-23 22:04:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:36,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601636725] [2020-10-23 22:04:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:38,031 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:04:38,735 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:39,538 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:40,287 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:40,964 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:41,560 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:42,266 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:42,921 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:43,532 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:43,534 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:43,535 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:44,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:44,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601636725] [2020-10-23 22:04:44,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:44,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 22:04:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618733313] [2020-10-23 22:04:44,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 22:04:44,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:44,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 22:04:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 22:04:44,843 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 36 states. [2020-10-23 22:04:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:50,844 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-10-23 22:04:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 22:04:50,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 107 [2020-10-23 22:04:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:50,848 INFO L225 Difference]: With dead ends: 128 [2020-10-23 22:04:50,848 INFO L226 Difference]: Without dead ends: 116 [2020-10-23 22:04:50,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 22:04:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-23 22:04:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-23 22:04:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 22:04:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-23 22:04:50,869 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-23 22:04:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:50,870 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-23 22:04:50,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 22:04:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-23 22:04:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 22:04:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:50,871 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:50,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 22:04:50,871 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 964795985, now seen corresponding path program 17 times [2020-10-23 22:04:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:50,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529328808] [2020-10-23 22:04:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:51,806 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:04:52,509 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:53,285 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:54,047 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:04:54,755 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:04:55,367 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:56,080 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:56,793 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:04:57,417 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:04:57,419 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:57,421 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:58,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:04:58,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529328808] [2020-10-23 22:04:58,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:58,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 22:04:58,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118668153] [2020-10-23 22:04:58,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 22:04:58,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 22:04:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 22:04:58,950 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 38 states. [2020-10-23 22:05:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:05:05,678 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-10-23 22:05:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 22:05:05,679 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2020-10-23 22:05:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:05:05,680 INFO L225 Difference]: With dead ends: 133 [2020-10-23 22:05:05,680 INFO L226 Difference]: Without dead ends: 121 [2020-10-23 22:05:05,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 22:05:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-23 22:05:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-23 22:05:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 22:05:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-23 22:05:05,704 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-10-23 22:05:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:05:05,704 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-23 22:05:05,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 22:05:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-23 22:05:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 22:05:05,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:05,705 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:05,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 22:05:05,706 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash 10217230, now seen corresponding path program 18 times [2020-10-23 22:05:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:05,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234777105] [2020-10-23 22:05:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:07,459 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 160 DAG size of output: 112 [2020-10-23 22:05:08,171 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:08,956 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:09,764 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:10,480 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:11,102 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:11,781 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:12,449 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:13,062 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:13,063 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:05:13,065 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:05:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:14,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:05:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:05:14,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234777105] [2020-10-23 22:05:14,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:05:14,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 22:05:14,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820820861] [2020-10-23 22:05:14,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 22:05:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:05:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 22:05:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 22:05:14,784 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 40 states. [2020-10-23 22:05:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:05:22,185 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-23 22:05:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 22:05:22,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-23 22:05:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:05:22,187 INFO L225 Difference]: With dead ends: 138 [2020-10-23 22:05:22,188 INFO L226 Difference]: Without dead ends: 126 [2020-10-23 22:05:22,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 22:05:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-23 22:05:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-23 22:05:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-23 22:05:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-23 22:05:22,214 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-23 22:05:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:05:22,215 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-23 22:05:22,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 22:05:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-23 22:05:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-23 22:05:22,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:22,216 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:22,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 22:05:22,216 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1187869583, now seen corresponding path program 19 times [2020-10-23 22:05:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:22,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779292117] [2020-10-23 22:05:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:23,171 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:05:23,909 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:24,710 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:25,483 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:26,199 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:26,833 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:27,566 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:28,297 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:28,927 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:28,928 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:05:28,930 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:05:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:30,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:05:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:05:30,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779292117] [2020-10-23 22:05:30,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:05:30,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 22:05:30,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644182651] [2020-10-23 22:05:30,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 22:05:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:05:30,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 22:05:30,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 22:05:30,842 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 42 states. [2020-10-23 22:05:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:05:39,123 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-10-23 22:05:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 22:05:39,127 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-10-23 22:05:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:05:39,128 INFO L225 Difference]: With dead ends: 143 [2020-10-23 22:05:39,128 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 22:05:39,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 22:05:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 22:05:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-23 22:05:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-23 22:05:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-23 22:05:39,150 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 122 [2020-10-23 22:05:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:05:39,151 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-23 22:05:39,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 22:05:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-23 22:05:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-23 22:05:39,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:39,152 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:39,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 22:05:39,152 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash 652922094, now seen corresponding path program 20 times [2020-10-23 22:05:39,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:39,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064278572] [2020-10-23 22:05:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:40,122 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:05:40,857 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:41,666 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:42,442 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:05:43,179 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:43,825 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:44,515 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:45,264 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:05:45,903 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:05:45,904 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:05:45,905 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:05:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:05:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:05:48,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064278572] [2020-10-23 22:05:48,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:05:48,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 22:05:48,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973038761] [2020-10-23 22:05:48,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 22:05:48,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:05:48,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 22:05:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 22:05:48,028 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 44 states. [2020-10-23 22:05:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:05:57,174 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-23 22:05:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-23 22:05:57,176 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2020-10-23 22:05:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:05:57,178 INFO L225 Difference]: With dead ends: 148 [2020-10-23 22:05:57,178 INFO L226 Difference]: Without dead ends: 136 [2020-10-23 22:05:57,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-10-23 22:05:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-23 22:05:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-23 22:05:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-23 22:05:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-23 22:05:57,209 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-23 22:05:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:05:57,209 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-23 22:05:57,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 22:05:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-23 22:05:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-23 22:05:57,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:57,211 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:57,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 22:05:57,211 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:57,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1750576495, now seen corresponding path program 21 times [2020-10-23 22:05:57,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:57,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393678841] [2020-10-23 22:05:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:58,198 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:05:58,968 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:05:59,862 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:00,677 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:01,423 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:06:02,075 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:02,819 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:03,579 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:04,241 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:04,242 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:04,244 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:06,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393678841] [2020-10-23 22:06:06,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:06,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 22:06:06,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462365897] [2020-10-23 22:06:06,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 22:06:06,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 22:06:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 22:06:06,633 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 46 states. [2020-10-23 22:06:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:17,007 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2020-10-23 22:06:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-23 22:06:17,008 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2020-10-23 22:06:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:17,010 INFO L225 Difference]: With dead ends: 153 [2020-10-23 22:06:17,010 INFO L226 Difference]: Without dead ends: 141 [2020-10-23 22:06:17,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-10-23 22:06:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-23 22:06:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-10-23 22:06:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-23 22:06:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-10-23 22:06:17,044 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2020-10-23 22:06:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:17,044 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-10-23 22:06:17,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 22:06:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-10-23 22:06:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-23 22:06:17,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:17,045 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:17,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 22:06:17,046 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 532404942, now seen corresponding path program 22 times [2020-10-23 22:06:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:17,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962070674] [2020-10-23 22:06:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:18,464 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-10-23 22:06:19,260 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:06:20,145 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:20,977 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:21,742 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:06:22,403 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:23,111 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:23,822 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:24,494 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:24,496 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:24,497 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:27,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:27,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962070674] [2020-10-23 22:06:27,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:27,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 22:06:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148909478] [2020-10-23 22:06:27,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 22:06:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 22:06:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 22:06:27,045 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 48 states. [2020-10-23 22:06:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:38,182 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-23 22:06:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-23 22:06:38,183 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2020-10-23 22:06:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:38,184 INFO L225 Difference]: With dead ends: 158 [2020-10-23 22:06:38,185 INFO L226 Difference]: Without dead ends: 146 [2020-10-23 22:06:38,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 22:06:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-23 22:06:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-23 22:06:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 22:06:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-10-23 22:06:38,219 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2020-10-23 22:06:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:38,220 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-10-23 22:06:38,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 22:06:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-10-23 22:06:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-23 22:06:38,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:38,221 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:38,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 22:06:38,221 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 649392305, now seen corresponding path program 23 times [2020-10-23 22:06:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:38,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731479386] [2020-10-23 22:06:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:39,469 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:06:40,257 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:06:41,172 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:42,061 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:06:42,838 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:06:43,500 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:44,249 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:45,036 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:06:45,718 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:06:45,720 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:45,721 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:48,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731479386] [2020-10-23 22:06:48,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:48,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-10-23 22:06:48,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986838908] [2020-10-23 22:06:48,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-23 22:06:48,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-23 22:06:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 22:06:48,580 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 50 states. [2020-10-23 22:07:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:07:00,679 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2020-10-23 22:07:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-23 22:07:00,680 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2020-10-23 22:07:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:07:00,682 INFO L225 Difference]: With dead ends: 163 [2020-10-23 22:07:00,682 INFO L226 Difference]: Without dead ends: 151 [2020-10-23 22:07:00,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 22:07:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-23 22:07:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-23 22:07:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-23 22:07:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-23 22:07:00,716 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-10-23 22:07:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:07:00,717 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-23 22:07:00,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-23 22:07:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-23 22:07:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-23 22:07:00,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:07:00,717 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:07:00,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 22:07:00,718 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:07:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:07:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -327348050, now seen corresponding path program 24 times [2020-10-23 22:07:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:07:00,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578331127] [2020-10-23 22:07:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:07:02,013 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:07:02,825 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:03,766 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:04,684 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:05,480 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:06,172 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:06,923 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:07,673 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:08,370 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:08,371 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:07:08,373 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:07:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:07:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:07:11,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578331127] [2020-10-23 22:07:11,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:07:11,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 22:07:11,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553070106] [2020-10-23 22:07:11,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 22:07:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:07:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 22:07:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 22:07:11,666 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 52 states. [2020-10-23 22:07:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:07:25,269 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2020-10-23 22:07:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-23 22:07:25,270 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 147 [2020-10-23 22:07:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:07:25,272 INFO L225 Difference]: With dead ends: 168 [2020-10-23 22:07:25,272 INFO L226 Difference]: Without dead ends: 156 [2020-10-23 22:07:25,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-10-23 22:07:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-23 22:07:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-23 22:07:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-23 22:07:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-23 22:07:25,303 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-10-23 22:07:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:07:25,303 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-23 22:07:25,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 22:07:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-23 22:07:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-23 22:07:25,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:07:25,305 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:07:25,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 22:07:25,305 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:07:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:07:25,306 INFO L82 PathProgramCache]: Analyzing trace with hash 430597841, now seen corresponding path program 25 times [2020-10-23 22:07:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:07:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978932011] [2020-10-23 22:07:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:07:26,373 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:07:27,222 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:28,123 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:29,074 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:29,880 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:30,609 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:31,446 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:32,245 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:32,939 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:32,940 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:07:32,942 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:07:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:07:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:07:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978932011] [2020-10-23 22:07:36,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:07:36,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-10-23 22:07:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694153221] [2020-10-23 22:07:36,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-23 22:07:36,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:07:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-23 22:07:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 22:07:36,489 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 54 states. [2020-10-23 22:07:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:07:51,201 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2020-10-23 22:07:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 22:07:51,201 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 152 [2020-10-23 22:07:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:07:51,204 INFO L225 Difference]: With dead ends: 173 [2020-10-23 22:07:51,204 INFO L226 Difference]: Without dead ends: 161 [2020-10-23 22:07:51,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-10-23 22:07:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-23 22:07:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-10-23 22:07:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-23 22:07:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-10-23 22:07:51,239 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 152 [2020-10-23 22:07:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:07:51,239 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-10-23 22:07:51,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-23 22:07:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-10-23 22:07:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-23 22:07:51,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:07:51,240 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:07:51,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 22:07:51,241 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:07:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:07:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 488402574, now seen corresponding path program 26 times [2020-10-23 22:07:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:07:51,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197050598] [2020-10-23 22:07:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:07:52,374 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:07:53,246 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:54,215 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:55,191 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:07:56,022 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:07:56,771 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:57,623 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:58,425 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:07:59,170 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:07:59,172 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:07:59,174 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:07:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:08:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:08:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197050598] [2020-10-23 22:08:03,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:08:03,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 22:08:03,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549639895] [2020-10-23 22:08:03,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 22:08:03,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:08:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 22:08:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 22:08:03,042 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 56 states. [2020-10-23 22:08:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:08:19,134 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-10-23 22:08:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-23 22:08:19,136 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 157 [2020-10-23 22:08:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:08:19,138 INFO L225 Difference]: With dead ends: 178 [2020-10-23 22:08:19,138 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 22:08:19,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-10-23 22:08:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 22:08:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-23 22:08:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-23 22:08:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-10-23 22:08:19,174 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 157 [2020-10-23 22:08:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:08:19,174 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-10-23 22:08:19,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 22:08:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-10-23 22:08:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-23 22:08:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:08:19,176 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:08:19,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 22:08:19,176 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:08:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:08:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1520782095, now seen corresponding path program 27 times [2020-10-23 22:08:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:08:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27440601] [2020-10-23 22:08:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:08:20,393 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:08:21,277 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:08:22,266 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:08:23,231 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:08:24,151 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:08:24,956 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:08:25,849 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:08:26,675 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:08:27,422 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:08:27,424 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:08:27,425 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:08:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:31,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:08:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:08:31,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27440601] [2020-10-23 22:08:31,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:08:31,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-10-23 22:08:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152146925] [2020-10-23 22:08:31,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 22:08:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:08:31,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 22:08:31,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 22:08:31,800 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 58 states. [2020-10-23 22:08:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:08:49,345 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2020-10-23 22:08:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-23 22:08:49,346 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 162 [2020-10-23 22:08:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:08:49,348 INFO L225 Difference]: With dead ends: 183 [2020-10-23 22:08:49,348 INFO L226 Difference]: Without dead ends: 171 [2020-10-23 22:08:49,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-10-23 22:08:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-23 22:08:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-23 22:08:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-23 22:08:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-10-23 22:08:49,397 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 162 [2020-10-23 22:08:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:08:49,397 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-10-23 22:08:49,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 22:08:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-10-23 22:08:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-23 22:08:49,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:08:49,399 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:08:49,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 22:08:49,399 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:08:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:08:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1341655954, now seen corresponding path program 28 times [2020-10-23 22:08:49,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:08:49,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236545293] [2020-10-23 22:08:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:08:50,919 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:08:51,817 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:08:52,858 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:08:53,817 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:08:54,697 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:08:55,472 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:08:56,316 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:08:57,166 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:08:57,941 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:08:57,943 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:08:57,945 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:08:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:02,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:09:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:09:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236545293] [2020-10-23 22:09:02,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:09:02,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-10-23 22:09:02,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713366346] [2020-10-23 22:09:02,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 22:09:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:09:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 22:09:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 22:09:02,693 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 60 states. [2020-10-23 22:09:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:09:22,240 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-10-23 22:09:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-23 22:09:22,242 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 167 [2020-10-23 22:09:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:09:22,244 INFO L225 Difference]: With dead ends: 188 [2020-10-23 22:09:22,244 INFO L226 Difference]: Without dead ends: 176 [2020-10-23 22:09:22,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-10-23 22:09:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-23 22:09:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-10-23 22:09:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-23 22:09:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-23 22:09:22,299 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-10-23 22:09:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:09:22,300 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-23 22:09:22,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 22:09:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-23 22:09:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-23 22:09:22,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:09:22,302 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:09:22,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 22:09:22,302 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:09:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:09:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1609049327, now seen corresponding path program 29 times [2020-10-23 22:09:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:09:22,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516165141] [2020-10-23 22:09:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:09:24,019 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:09:24,984 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:09:26,009 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:09:27,078 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:09:28,012 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:09:28,833 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:09:29,790 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:09:30,725 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:09:31,554 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:09:31,556 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:09:31,557 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:09:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:09:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:09:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516165141] [2020-10-23 22:09:37,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:09:37,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-10-23 22:09:37,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732328946] [2020-10-23 22:09:37,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-23 22:09:37,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:09:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-23 22:09:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 22:09:37,036 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 62 states. [2020-10-23 22:09:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:09:58,572 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-10-23 22:09:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-23 22:09:58,574 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-10-23 22:09:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:09:58,576 INFO L225 Difference]: With dead ends: 193 [2020-10-23 22:09:58,576 INFO L226 Difference]: Without dead ends: 181 [2020-10-23 22:09:58,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-10-23 22:09:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-23 22:09:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-10-23 22:09:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-23 22:09:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-10-23 22:09:58,624 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-10-23 22:09:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:09:58,625 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-10-23 22:09:58,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-23 22:09:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-10-23 22:09:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-23 22:09:58,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:09:58,626 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:09:58,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 22:09:58,626 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:09:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:09:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -231890354, now seen corresponding path program 30 times [2020-10-23 22:09:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:09:58,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225939886] [2020-10-23 22:09:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:09:59,910 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:10:00,947 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:10:02,025 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:10:03,104 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:10:04,105 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:10:04,976 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:10:05,914 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:10:06,923 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:10:07,806 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:10:07,809 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:10:07,810 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:13,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:13,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225939886] [2020-10-23 22:10:13,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:13,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-10-23 22:10:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264856550] [2020-10-23 22:10:13,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 22:10:13,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:13,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 22:10:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 22:10:13,784 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 64 states. [2020-10-23 22:10:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:10:39,473 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-10-23 22:10:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-23 22:10:39,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 177 [2020-10-23 22:10:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:10:39,477 INFO L225 Difference]: With dead ends: 198 [2020-10-23 22:10:39,478 INFO L226 Difference]: Without dead ends: 186 [2020-10-23 22:10:39,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-10-23 22:10:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-23 22:10:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-23 22:10:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-23 22:10:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-10-23 22:10:39,532 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2020-10-23 22:10:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:10:39,533 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-10-23 22:10:39,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 22:10:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-10-23 22:10:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-23 22:10:39,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:10:39,534 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:10:39,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 22:10:39,535 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:10:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:10:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1582048975, now seen corresponding path program 31 times [2020-10-23 22:10:39,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:10:39,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22077377] [2020-10-23 22:10:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:41,367 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:10:42,491 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:10:43,779 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:10:44,991 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:10:46,142 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:10:47,137 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:10:48,268 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:10:49,342 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:10:50,317 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:10:50,320 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:10:50,322 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:10:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:57,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:10:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:10:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:10:57,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22077377] [2020-10-23 22:10:57,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:10:57,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-10-23 22:10:57,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892675382] [2020-10-23 22:10:57,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-23 22:10:57,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:10:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-23 22:10:57,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 22:10:57,469 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 66 states. [2020-10-23 22:11:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:27,509 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-10-23 22:11:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-23 22:11:27,511 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 182 [2020-10-23 22:11:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:27,513 INFO L225 Difference]: With dead ends: 203 [2020-10-23 22:11:27,514 INFO L226 Difference]: Without dead ends: 191 [2020-10-23 22:11:27,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-10-23 22:11:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-23 22:11:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-10-23 22:11:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-23 22:11:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-10-23 22:11:27,563 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2020-10-23 22:11:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:27,564 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-10-23 22:11:27,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-23 22:11:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-10-23 22:11:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-23 22:11:27,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:27,566 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:11:27,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 22:11:27,566 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1593538606, now seen corresponding path program 32 times [2020-10-23 22:11:27,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:27,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776816387] [2020-10-23 22:11:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:29,515 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-10-23 22:11:30,733 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:11:32,072 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:11:33,463 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:11:34,679 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:11:35,719 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:11:36,980 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:11:38,127 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:11:39,210 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:11:39,213 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:11:39,215 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:47,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:11:47,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776816387] [2020-10-23 22:11:47,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:47,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-10-23 22:11:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065478213] [2020-10-23 22:11:47,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-23 22:11:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-23 22:11:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 22:11:47,228 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 68 states. [2020-10-23 22:12:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:12:21,633 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-10-23 22:12:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-23 22:12:21,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 187 [2020-10-23 22:12:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:12:21,639 INFO L225 Difference]: With dead ends: 208 [2020-10-23 22:12:21,639 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 22:12:21,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-10-23 22:12:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 22:12:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-10-23 22:12:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-23 22:12:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-10-23 22:12:21,707 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 187 [2020-10-23 22:12:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:12:21,707 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-10-23 22:12:21,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-23 22:12:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-10-23 22:12:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-23 22:12:21,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:12:21,709 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:12:21,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 22:12:21,709 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:12:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:12:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash 595636049, now seen corresponding path program 33 times [2020-10-23 22:12:21,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:12:21,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942421628] [2020-10-23 22:12:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:12:23,410 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:12:24,744 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:12:26,206 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:12:27,662 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:12:29,020 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:12:30,183 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:12:31,513 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:12:32,755 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:12:33,949 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:12:33,952 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:12:33,953 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:12:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:43,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:12:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:12:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942421628] [2020-10-23 22:12:43,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:12:43,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-10-23 22:12:43,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412950407] [2020-10-23 22:12:43,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-23 22:12:43,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:12:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-23 22:12:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 22:12:43,300 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 70 states. [2020-10-23 22:13:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:13:22,584 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-10-23 22:13:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-23 22:13:22,588 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 192 [2020-10-23 22:13:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:13:22,590 INFO L225 Difference]: With dead ends: 213 [2020-10-23 22:13:22,590 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 22:13:22,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-10-23 22:13:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 22:13:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-23 22:13:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-23 22:13:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2020-10-23 22:13:22,664 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 192 [2020-10-23 22:13:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:13:22,664 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2020-10-23 22:13:22,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-23 22:13:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2020-10-23 22:13:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-23 22:13:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:13:22,666 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:13:22,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 22:13:22,667 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:13:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:13:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2141227506, now seen corresponding path program 34 times [2020-10-23 22:13:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:13:22,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388979456] [2020-10-23 22:13:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:13:24,473 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-10-23 22:13:25,946 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:13:27,513 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:13:29,142 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:13:30,520 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:13:31,730 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:13:33,210 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:13:34,625 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:13:35,878 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:13:35,882 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:13:35,884 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:13:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:13:46,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:13:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:13:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:13:46,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388979456] [2020-10-23 22:13:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:13:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-10-23 22:13:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583236503] [2020-10-23 22:13:46,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-23 22:13:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:13:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-23 22:13:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 22:13:46,577 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 72 states. [2020-10-23 22:14:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:14:24,110 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2020-10-23 22:14:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 22:14:24,113 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 197 [2020-10-23 22:14:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:14:24,115 INFO L225 Difference]: With dead ends: 218 [2020-10-23 22:14:24,115 INFO L226 Difference]: Without dead ends: 206 [2020-10-23 22:14:24,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-10-23 22:14:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-23 22:14:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-10-23 22:14:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-23 22:14:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-10-23 22:14:24,157 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 197 [2020-10-23 22:14:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:14:24,158 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-10-23 22:14:24,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-23 22:14:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-10-23 22:14:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-23 22:14:24,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:14:24,160 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:14:24,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 22:14:24,160 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:14:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:14:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1605345935, now seen corresponding path program 35 times [2020-10-23 22:14:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:14:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822528032] [2020-10-23 22:14:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:14:26,509 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-10-23 22:14:27,811 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:14:29,233 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:14:30,549 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-23 22:14:31,740 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-23 22:14:32,789 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:14:33,998 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:14:35,201 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-23 22:14:36,250 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-23 22:14:36,252 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:14:36,254 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:14:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:14:45,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:14:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:14:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:14:45,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822528032] [2020-10-23 22:14:45,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:14:45,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-10-23 22:14:45,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246301384] [2020-10-23 22:14:45,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-23 22:14:45,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:14:45,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-23 22:14:45,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 22:14:45,992 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 74 states.