/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 0.2.0-7d8eed3 [2020-11-07 02:11:19,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:11:19,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:11:19,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:11:19,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:11:19,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:11:19,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:11:19,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:11:19,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:11:19,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:11:19,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:11:19,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:11:19,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:11:19,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:11:19,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:11:19,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:11:19,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:11:19,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:11:19,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:11:19,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:11:19,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:11:19,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:11:19,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:11:19,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:11:19,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:11:19,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:11:19,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:11:19,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:11:19,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:11:19,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:11:19,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:11:19,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:11:19,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:11:19,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:11:19,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:11:19,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:11:19,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:11:19,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:11:19,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:11:19,825 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:11:19,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:11:19,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:11:19,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:11:19,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:11:19,826 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:11:19,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:11:19,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:11:19,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:11:19,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:11:19,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:11:19,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:11:19,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:11:20,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:11:20,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:11:20,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:11:20,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:11:20,290 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:11:20,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-07 02:11:20,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f66016/08194023f79648f389f418f29b732ff3/FLAG83bb03976 [2020-11-07 02:11:21,083 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:11:21,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-07 02:11:21,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f66016/08194023f79648f389f418f29b732ff3/FLAG83bb03976 [2020-11-07 02:11:21,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a6f66016/08194023f79648f389f418f29b732ff3 [2020-11-07 02:11:21,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:11:21,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:11:21,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:21,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:11:21,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:11:21,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1ac123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21, skipping insertion in model container [2020-11-07 02:11:21,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:11:21,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:11:21,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:21,664 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:11:21,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:11:21,699 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:11:21,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21 WrapperNode [2020-11-07 02:11:21,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:11:21,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:11:21,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:11:21,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:11:21,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (1/1) ... [2020-11-07 02:11:21,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:11:21,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:11:21,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:11:21,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:11:21,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (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 [2020-11-07 02:11:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:11:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:11:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:11:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:11:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:11:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:11:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:11:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:11:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:11:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:11:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:11:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:11:22,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:11:22,177 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:11:22,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:22 BoogieIcfgContainer [2020-11-07 02:11:22,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:11:22,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:11:22,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:11:22,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:11:22,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:21" (1/3) ... [2020-11-07 02:11:22,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8d5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:22, skipping insertion in model container [2020-11-07 02:11:22,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:21" (2/3) ... [2020-11-07 02:11:22,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8d5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:22, skipping insertion in model container [2020-11-07 02:11:22,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:22" (3/3) ... [2020-11-07 02:11:22,189 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-11-07 02:11:22,206 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:11:22,209 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:11:22,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:11:22,245 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:11:22,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:11:22,245 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:11:22,246 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:11:22,246 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:11:22,246 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:11:22,246 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:11:22,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:11:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-07 02:11:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 02:11:22,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:22,283 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] [2020-11-07 02:11:22,284 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash -901635656, now seen corresponding path program 1 times [2020-11-07 02:11:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:22,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952868972] [2020-11-07 02:11:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:22,396 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:22,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952868972] [2020-11-07 02:11:22,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:22,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:11:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366036273] [2020-11-07 02:11:22,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:11:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:11:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:11:22,696 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-11-07 02:11:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:22,881 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-11-07 02:11:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:11:22,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-07 02:11:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:22,908 INFO L225 Difference]: With dead ends: 50 [2020-11-07 02:11:22,908 INFO L226 Difference]: Without dead ends: 27 [2020-11-07 02:11:22,914 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 [2020-11-07 02:11:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-07 02:11:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-07 02:11:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 02:11:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-07 02:11:22,997 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-11-07 02:11:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:22,998 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-07 02:11:22,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:11:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-07 02:11:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 02:11:23,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:23,003 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] [2020-11-07 02:11:23,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:11:23,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1302443770, now seen corresponding path program 1 times [2020-11-07 02:11:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059661866] [2020-11-07 02:11:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:23,025 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:23,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:23,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059661866] [2020-11-07 02:11:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:11:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396051071] [2020-11-07 02:11:23,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:11:23,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:11:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:11:23,292 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2020-11-07 02:11:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:23,531 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-07 02:11:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 02:11:23,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-07 02:11:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:23,534 INFO L225 Difference]: With dead ends: 39 [2020-11-07 02:11:23,534 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 02:11:23,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:11:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 02:11:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-07 02:11:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 02:11:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-07 02:11:23,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-11-07 02:11:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:23,549 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-07 02:11:23,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:11:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-07 02:11:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 02:11:23,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:23,551 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] [2020-11-07 02:11:23,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:11:23,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 642832942, now seen corresponding path program 1 times [2020-11-07 02:11:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212105978] [2020-11-07 02:11:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:24,253 WARN L194 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:24,275 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:24,281 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:24,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212105978] [2020-11-07 02:11:24,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:24,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:11:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699428081] [2020-11-07 02:11:24,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:11:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:24,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:11:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:11:24,447 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 4 states. [2020-11-07 02:11:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:24,546 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-11-07 02:11:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:11:24,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-07 02:11:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:24,548 INFO L225 Difference]: With dead ends: 48 [2020-11-07 02:11:24,548 INFO L226 Difference]: Without dead ends: 36 [2020-11-07 02:11:24,549 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 [2020-11-07 02:11:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-07 02:11:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-07 02:11:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 02:11:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 02:11:24,560 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-11-07 02:11:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:24,560 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 02:11:24,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:11:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 02:11:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 02:11:24,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:24,562 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] [2020-11-07 02:11:24,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:11:24,562 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash -466055855, now seen corresponding path program 1 times [2020-11-07 02:11:24,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:24,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45808312] [2020-11-07 02:11:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:25,534 WARN L194 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:11:26,098 WARN L194 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:26,574 WARN L194 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:26,577 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:26,579 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:26,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:26,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45808312] [2020-11-07 02:11:26,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:26,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:11:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436306261] [2020-11-07 02:11:26,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:11:26,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:11:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:11:26,735 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-11-07 02:11:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:26,996 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-11-07 02:11:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:11:26,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-07 02:11:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:26,998 INFO L225 Difference]: With dead ends: 53 [2020-11-07 02:11:26,998 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 02:11:26,999 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 [2020-11-07 02:11:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 02:11:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-07 02:11:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 02:11:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-07 02:11:27,024 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-11-07 02:11:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:27,024 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-07 02:11:27,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:11:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-07 02:11:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:11:27,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:27,028 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] [2020-11-07 02:11:27,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:11:27,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1843550222, now seen corresponding path program 2 times [2020-11-07 02:11:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033869210] [2020-11-07 02:11:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:27,773 WARN L194 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:11:28,345 WARN L194 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:28,855 WARN L194 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:28,858 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:28,860 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:29,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033869210] [2020-11-07 02:11:29,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:29,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:11:29,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119416303] [2020-11-07 02:11:29,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:11:29,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:11:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:11:29,034 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 8 states. [2020-11-07 02:11:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:29,421 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-11-07 02:11:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:11:29,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-11-07 02:11:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:29,423 INFO L225 Difference]: With dead ends: 58 [2020-11-07 02:11:29,423 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 02:11:29,425 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 [2020-11-07 02:11:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 02:11:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-07 02:11:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-07 02:11:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-07 02:11:29,438 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-11-07 02:11:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-07 02:11:29,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:11:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-07 02:11:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 02:11:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:29,440 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] [2020-11-07 02:11:29,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:11:29,441 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2068495217, now seen corresponding path program 3 times [2020-11-07 02:11:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:29,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281907088] [2020-11-07 02:11:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:30,397 WARN L194 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:11:30,947 WARN L194 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:31,436 WARN L194 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:31,439 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:31,441 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:31,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281907088] [2020-11-07 02:11:31,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:31,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:11:31,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372179807] [2020-11-07 02:11:31,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:11:31,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:11:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:11:31,670 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-11-07 02:11:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:32,272 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-11-07 02:11:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:11:32,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-11-07 02:11:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:32,275 INFO L225 Difference]: With dead ends: 63 [2020-11-07 02:11:32,275 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 02:11:32,279 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 [2020-11-07 02:11:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 02:11:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-07 02:11:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 02:11:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-07 02:11:32,311 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2020-11-07 02:11:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:32,311 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-07 02:11:32,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:11:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-07 02:11:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:11:32,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:32,317 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] [2020-11-07 02:11:32,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:11:32,321 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash 664272366, now seen corresponding path program 4 times [2020-11-07 02:11:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:32,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516950388] [2020-11-07 02:11:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:33,258 WARN L194 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:11:33,766 WARN L194 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:34,253 WARN L194 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:34,257 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:34,259 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:34,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516950388] [2020-11-07 02:11:34,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:34,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 02:11:34,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453669352] [2020-11-07 02:11:34,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 02:11:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 02:11:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:11:34,514 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-11-07 02:11:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:35,290 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-11-07 02:11:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:11:35,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-11-07 02:11:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:35,292 INFO L225 Difference]: With dead ends: 68 [2020-11-07 02:11:35,292 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 02:11:35,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-07 02:11:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 02:11:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-11-07 02:11:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 02:11:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-11-07 02:11:35,323 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-11-07 02:11:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:35,325 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-11-07 02:11:35,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 02:11:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-11-07 02:11:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 02:11:35,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:35,330 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] [2020-11-07 02:11:35,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:11:35,330 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1735278191, now seen corresponding path program 5 times [2020-11-07 02:11:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:35,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876790169] [2020-11-07 02:11:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:36,210 WARN L194 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:11:36,776 WARN L194 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:37,239 WARN L194 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:37,245 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:37,247 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876790169] [2020-11-07 02:11:37,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:37,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 02:11:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600275313] [2020-11-07 02:11:37,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 02:11:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 02:11:37,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:11:37,604 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-11-07 02:11:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:38,550 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-11-07 02:11:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 02:11:38,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-11-07 02:11:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:38,552 INFO L225 Difference]: With dead ends: 73 [2020-11-07 02:11:38,553 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 02:11:38,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:11:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 02:11:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-11-07 02:11:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 02:11:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-11-07 02:11:38,571 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-11-07 02:11:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:38,572 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-11-07 02:11:38,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 02:11:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-11-07 02:11:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 02:11:38,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:38,574 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] [2020-11-07 02:11:38,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:11:38,574 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1302344754, now seen corresponding path program 6 times [2020-11-07 02:11:38,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:38,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96197487] [2020-11-07 02:11:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:39,340 WARN L194 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:11:39,905 WARN L194 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:40,366 WARN L194 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:40,368 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:40,369 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:40,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96197487] [2020-11-07 02:11:40,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:40,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:11:40,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955811512] [2020-11-07 02:11:40,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:11:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:11:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:11:40,706 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 16 states. [2020-11-07 02:11:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:41,891 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-11-07 02:11:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 02:11:41,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-11-07 02:11:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:41,893 INFO L225 Difference]: With dead ends: 78 [2020-11-07 02:11:41,893 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 02:11:41,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 02:11:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 02:11:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-11-07 02:11:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 02:11:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-11-07 02:11:41,926 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-11-07 02:11:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:41,929 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-11-07 02:11:41,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:11:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-11-07 02:11:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 02:11:41,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:41,933 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] [2020-11-07 02:11:41,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:11:41,935 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash 31432625, now seen corresponding path program 7 times [2020-11-07 02:11:41,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:41,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427377061] [2020-11-07 02:11:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:42,643 WARN L194 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:11:43,171 WARN L194 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:43,649 WARN L194 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:43,650 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:43,652 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:44,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:44,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427377061] [2020-11-07 02:11:44,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:44,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 02:11:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374920833] [2020-11-07 02:11:44,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 02:11:44,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 02:11:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:11:44,062 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2020-11-07 02:11:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:45,447 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-11-07 02:11:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 02:11:45,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-11-07 02:11:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:45,449 INFO L225 Difference]: With dead ends: 83 [2020-11-07 02:11:45,450 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 02:11:45,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:11:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 02:11:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-11-07 02:11:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 02:11:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-11-07 02:11:45,479 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2020-11-07 02:11:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:45,480 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-11-07 02:11:45,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 02:11:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-11-07 02:11:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 02:11:45,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:45,482 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] [2020-11-07 02:11:45,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:11:45,483 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 463978926, now seen corresponding path program 8 times [2020-11-07 02:11:45,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:45,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022381628] [2020-11-07 02:11:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:46,854 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 160 DAG size of output: 107 [2020-11-07 02:11:47,386 WARN L194 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:47,868 WARN L194 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:47,870 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:47,871 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:48,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022381628] [2020-11-07 02:11:48,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:48,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 02:11:48,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701689442] [2020-11-07 02:11:48,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 02:11:48,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 02:11:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:11:48,328 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 20 states. [2020-11-07 02:11:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:50,030 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-11-07 02:11:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 02:11:50,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-11-07 02:11:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:50,032 INFO L225 Difference]: With dead ends: 88 [2020-11-07 02:11:50,032 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 02:11:50,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 02:11:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 02:11:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-11-07 02:11:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 02:11:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-11-07 02:11:50,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-11-07 02:11:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:50,050 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-11-07 02:11:50,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 02:11:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-11-07 02:11:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 02:11:50,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:50,052 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] [2020-11-07 02:11:50,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:11:50,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -561621551, now seen corresponding path program 9 times [2020-11-07 02:11:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:50,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859226659] [2020-11-07 02:11:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:50,731 WARN L194 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:11:51,249 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:51,727 WARN L194 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:51,728 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:51,730 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:52,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:52,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859226659] [2020-11-07 02:11:52,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:52,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 02:11:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157321842] [2020-11-07 02:11:52,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 02:11:52,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 02:11:52,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-11-07 02:11:52,246 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-11-07 02:11:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:54,232 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-11-07 02:11:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 02:11:54,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-11-07 02:11:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:54,234 INFO L225 Difference]: With dead ends: 93 [2020-11-07 02:11:54,234 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 02:11:54,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 02:11:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 02:11:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-11-07 02:11:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 02:11:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-11-07 02:11:54,256 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 72 [2020-11-07 02:11:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:54,257 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-11-07 02:11:54,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 02:11:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-11-07 02:11:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 02:11:54,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:54,258 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] [2020-11-07 02:11:54,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:11:54,258 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash -10625138, now seen corresponding path program 10 times [2020-11-07 02:11:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:54,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936995603] [2020-11-07 02:11:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:11:55,609 WARN L194 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-11-07 02:11:56,137 WARN L194 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:11:56,631 WARN L194 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:11:56,633 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:11:56,634 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:11:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:57,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:11:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:11:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:11:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936995603] [2020-11-07 02:11:57,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:11:57,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 02:11:57,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449328563] [2020-11-07 02:11:57,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 02:11:57,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:11:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 02:11:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-11-07 02:11:57,208 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-11-07 02:11:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:11:59,464 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-11-07 02:11:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 02:11:59,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-11-07 02:11:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:11:59,466 INFO L225 Difference]: With dead ends: 98 [2020-11-07 02:11:59,466 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 02:11:59,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 02:11:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 02:11:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-11-07 02:11:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 02:11:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-11-07 02:11:59,496 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-11-07 02:11:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:11:59,497 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-11-07 02:11:59,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 02:11:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-11-07 02:11:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 02:11:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:11:59,498 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] [2020-11-07 02:11:59,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 02:11:59,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:11:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:11:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash -682105871, now seen corresponding path program 11 times [2020-11-07 02:11:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:11:59,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912289110] [2020-11-07 02:11:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:00,254 WARN L194 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:12:00,775 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:01,257 WARN L194 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:01,259 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:01,261 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:01,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912289110] [2020-11-07 02:12:01,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:01,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 02:12:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177550539] [2020-11-07 02:12:01,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 02:12:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 02:12:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-11-07 02:12:01,915 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2020-11-07 02:12:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:04,586 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-11-07 02:12:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 02:12:04,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-11-07 02:12:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:04,588 INFO L225 Difference]: With dead ends: 103 [2020-11-07 02:12:04,589 INFO L226 Difference]: Without dead ends: 91 [2020-11-07 02:12:04,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 02:12:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-07 02:12:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-11-07 02:12:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 02:12:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-11-07 02:12:04,607 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2020-11-07 02:12:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:04,608 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-11-07 02:12:04,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 02:12:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-11-07 02:12:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 02:12:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:04,609 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] [2020-11-07 02:12:04,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 02:12:04,609 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1743791470, now seen corresponding path program 12 times [2020-11-07 02:12:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:04,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608387823] [2020-11-07 02:12:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:06,018 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-11-07 02:12:06,578 WARN L194 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:07,057 WARN L194 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:07,059 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:07,061 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:07,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:07,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608387823] [2020-11-07 02:12:07,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:07,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 02:12:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390558512] [2020-11-07 02:12:07,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 02:12:07,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:07,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 02:12:07,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-11-07 02:12:07,799 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 28 states. [2020-11-07 02:12:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:10,852 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-11-07 02:12:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 02:12:10,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-11-07 02:12:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:10,854 INFO L225 Difference]: With dead ends: 108 [2020-11-07 02:12:10,855 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 02:12:10,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 02:12:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 02:12:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-11-07 02:12:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 02:12:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-11-07 02:12:10,871 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-11-07 02:12:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:10,871 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-11-07 02:12:10,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 02:12:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-11-07 02:12:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 02:12:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:10,872 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] [2020-11-07 02:12:10,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 02:12:10,872 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 916867601, now seen corresponding path program 13 times [2020-11-07 02:12:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:10,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566711277] [2020-11-07 02:12:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:12,393 WARN L194 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 161 DAG size of output: 120 [2020-11-07 02:12:12,961 WARN L194 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:13,462 WARN L194 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:13,463 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:13,464 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:14,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:14,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566711277] [2020-11-07 02:12:14,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:14,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-11-07 02:12:14,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942738217] [2020-11-07 02:12:14,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 02:12:14,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 02:12:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-11-07 02:12:14,261 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 30 states. [2020-11-07 02:12:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:17,658 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-11-07 02:12:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 02:12:17,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-11-07 02:12:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:17,660 INFO L225 Difference]: With dead ends: 113 [2020-11-07 02:12:17,660 INFO L226 Difference]: Without dead ends: 101 [2020-11-07 02:12:17,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=359, Invalid=4471, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 02:12:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-07 02:12:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-11-07 02:12:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-07 02:12:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-11-07 02:12:17,680 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2020-11-07 02:12:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:17,680 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-11-07 02:12:17,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 02:12:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-11-07 02:12:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 02:12:17,681 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:17,681 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] [2020-11-07 02:12:17,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 02:12:17,682 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713266, now seen corresponding path program 14 times [2020-11-07 02:12:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:17,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119649135] [2020-11-07 02:12:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:19,149 WARN L194 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 156 DAG size of output: 116 [2020-11-07 02:12:19,691 WARN L194 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:20,182 WARN L194 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:20,183 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:20,184 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:21,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:21,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119649135] [2020-11-07 02:12:21,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:21,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 02:12:21,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022787224] [2020-11-07 02:12:21,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 02:12:21,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 02:12:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-11-07 02:12:21,070 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 32 states. [2020-11-07 02:12:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:24,968 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-11-07 02:12:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 02:12:24,969 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-11-07 02:12:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:24,970 INFO L225 Difference]: With dead ends: 118 [2020-11-07 02:12:24,971 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 02:12:24,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=386, Invalid=5164, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 02:12:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 02:12:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-11-07 02:12:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-07 02:12:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-11-07 02:12:24,992 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-11-07 02:12:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:24,992 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-11-07 02:12:24,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 02:12:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-11-07 02:12:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 02:12:24,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:24,994 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] [2020-11-07 02:12:24,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 02:12:24,994 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash 138643505, now seen corresponding path program 15 times [2020-11-07 02:12:24,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:24,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412457737] [2020-11-07 02:12:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:25,945 WARN L194 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:12:26,522 WARN L194 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:27,027 WARN L194 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:27,028 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:27,029 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:27,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:27,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412457737] [2020-11-07 02:12:27,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:27,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-11-07 02:12:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746079453] [2020-11-07 02:12:27,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 02:12:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:27,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 02:12:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 02:12:27,961 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 34 states. [2020-11-07 02:12:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:32,342 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-11-07 02:12:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 02:12:32,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-11-07 02:12:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:32,344 INFO L225 Difference]: With dead ends: 123 [2020-11-07 02:12:32,344 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 02:12:32,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=413, Invalid=5907, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 02:12:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 02:12:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-11-07 02:12:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 02:12:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-11-07 02:12:32,364 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 102 [2020-11-07 02:12:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:32,364 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-11-07 02:12:32,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 02:12:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-11-07 02:12:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 02:12:32,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:32,365 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] [2020-11-07 02:12:32,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 02:12:32,365 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1507928366, now seen corresponding path program 16 times [2020-11-07 02:12:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:32,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217357437] [2020-11-07 02:12:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:33,898 WARN L194 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 157 DAG size of output: 118 [2020-11-07 02:12:34,432 WARN L194 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:34,943 WARN L194 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:34,945 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:34,946 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:35,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:35,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217357437] [2020-11-07 02:12:35,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:35,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 02:12:35,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427423252] [2020-11-07 02:12:35,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 02:12:35,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 02:12:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 02:12:36,000 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 36 states. [2020-11-07 02:12:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:40,899 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-11-07 02:12:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 02:12:40,901 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 107 [2020-11-07 02:12:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:40,902 INFO L225 Difference]: With dead ends: 128 [2020-11-07 02:12:40,902 INFO L226 Difference]: Without dead ends: 116 [2020-11-07 02:12:40,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 02:12:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-07 02:12:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-11-07 02:12:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 02:12:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-11-07 02:12:40,923 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-11-07 02:12:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:40,923 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-11-07 02:12:40,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 02:12:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-11-07 02:12:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-07 02:12:40,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:40,924 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] [2020-11-07 02:12:40,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 02:12:40,924 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash 964795985, now seen corresponding path program 17 times [2020-11-07 02:12:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:40,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797001419] [2020-11-07 02:12:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:42,048 WARN L194 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-11-07 02:12:42,639 WARN L194 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:43,152 WARN L194 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:43,153 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:43,154 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:44,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797001419] [2020-11-07 02:12:44,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:44,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 02:12:44,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361615650] [2020-11-07 02:12:44,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 02:12:44,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 02:12:44,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 02:12:44,422 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 38 states. [2020-11-07 02:12:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:49,822 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2020-11-07 02:12:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 02:12:49,823 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2020-11-07 02:12:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:49,825 INFO L225 Difference]: With dead ends: 133 [2020-11-07 02:12:49,825 INFO L226 Difference]: Without dead ends: 121 [2020-11-07 02:12:49,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 02:12:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-07 02:12:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-11-07 02:12:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 02:12:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-11-07 02:12:49,852 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2020-11-07 02:12:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:49,852 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-11-07 02:12:49,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 02:12:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-11-07 02:12:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 02:12:49,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:49,853 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] [2020-11-07 02:12:49,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 02:12:49,853 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash 10217230, now seen corresponding path program 18 times [2020-11-07 02:12:49,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:49,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583993786] [2020-11-07 02:12:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:12:50,827 WARN L194 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:12:51,383 WARN L194 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:12:51,895 WARN L194 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:12:51,899 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:12:51,900 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:12:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:53,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:12:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:12:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:12:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583993786] [2020-11-07 02:12:53,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:12:53,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-11-07 02:12:53,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493441003] [2020-11-07 02:12:53,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 02:12:53,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:12:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 02:12:53,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 02:12:53,271 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 40 states. [2020-11-07 02:12:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:12:59,256 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-11-07 02:12:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 02:12:59,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-11-07 02:12:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:12:59,258 INFO L225 Difference]: With dead ends: 138 [2020-11-07 02:12:59,258 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 02:12:59,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 02:12:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 02:12:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-11-07 02:12:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-07 02:12:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-11-07 02:12:59,280 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-11-07 02:12:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:12:59,280 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-11-07 02:12:59,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 02:12:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-11-07 02:12:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-07 02:12:59,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:12:59,281 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] [2020-11-07 02:12:59,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 02:12:59,282 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:12:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:12:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1187869583, now seen corresponding path program 19 times [2020-11-07 02:12:59,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:12:59,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181925246] [2020-11-07 02:12:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:00,260 WARN L194 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:13:00,825 WARN L194 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:13:01,344 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:13:01,346 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:01,347 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:02,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181925246] [2020-11-07 02:13:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:02,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 02:13:02,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885240807] [2020-11-07 02:13:02,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 02:13:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 02:13:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 02:13:02,891 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 42 states. [2020-11-07 02:13:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:09,595 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-11-07 02:13:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 02:13:09,599 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-11-07 02:13:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:09,601 INFO L225 Difference]: With dead ends: 143 [2020-11-07 02:13:09,601 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 02:13:09,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=521, Invalid=9379, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 02:13:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 02:13:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-11-07 02:13:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-07 02:13:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-11-07 02:13:09,622 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 122 [2020-11-07 02:13:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:09,623 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-11-07 02:13:09,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 02:13:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-11-07 02:13:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 02:13:09,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:09,624 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] [2020-11-07 02:13:09,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 02:13:09,624 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 652922094, now seen corresponding path program 20 times [2020-11-07 02:13:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536346863] [2020-11-07 02:13:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:11,186 WARN L194 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 156 DAG size of output: 116 [2020-11-07 02:13:11,832 WARN L194 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:13:12,392 WARN L194 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:13:12,395 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:12,396 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:14,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536346863] [2020-11-07 02:13:14,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:14,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 02:13:14,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209424307] [2020-11-07 02:13:14,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 02:13:14,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 02:13:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 02:13:14,189 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 44 states. [2020-11-07 02:13:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:21,898 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-11-07 02:13:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 02:13:21,899 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2020-11-07 02:13:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:21,900 INFO L225 Difference]: With dead ends: 148 [2020-11-07 02:13:21,901 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 02:13:21,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=548, Invalid=10372, Unknown=0, NotChecked=0, Total=10920 [2020-11-07 02:13:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 02:13:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-11-07 02:13:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 02:13:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-11-07 02:13:21,939 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-11-07 02:13:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:21,940 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-11-07 02:13:21,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 02:13:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-11-07 02:13:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-07 02:13:21,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:21,941 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] [2020-11-07 02:13:21,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 02:13:21,941 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1750576495, now seen corresponding path program 21 times [2020-11-07 02:13:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:21,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92348230] [2020-11-07 02:13:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:23,076 WARN L194 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-11-07 02:13:23,636 WARN L194 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:13:24,156 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:13:24,159 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:24,161 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:25,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:26,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92348230] [2020-11-07 02:13:26,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:26,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-11-07 02:13:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596209993] [2020-11-07 02:13:26,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 02:13:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 02:13:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 02:13:26,007 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 46 states. [2020-11-07 02:13:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:34,257 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2020-11-07 02:13:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 02:13:34,258 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2020-11-07 02:13:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:34,259 INFO L225 Difference]: With dead ends: 153 [2020-11-07 02:13:34,260 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 02:13:34,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=575, Invalid=11415, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 02:13:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 02:13:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-11-07 02:13:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-07 02:13:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-11-07 02:13:34,292 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2020-11-07 02:13:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:34,293 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-11-07 02:13:34,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 02:13:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-11-07 02:13:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 02:13:34,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:34,294 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] [2020-11-07 02:13:34,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 02:13:34,294 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 532404942, now seen corresponding path program 22 times [2020-11-07 02:13:34,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:34,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467934528] [2020-11-07 02:13:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:35,918 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-11-07 02:13:36,505 WARN L194 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:13:37,019 WARN L194 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:13:37,021 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:37,022 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:39,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:39,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467934528] [2020-11-07 02:13:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:39,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 02:13:39,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230706970] [2020-11-07 02:13:39,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 02:13:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 02:13:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 02:13:39,115 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 48 states. [2020-11-07 02:13:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:13:47,950 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-11-07 02:13:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 02:13:47,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2020-11-07 02:13:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:13:47,952 INFO L225 Difference]: With dead ends: 158 [2020-11-07 02:13:47,953 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 02:13:47,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=602, Invalid=12508, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 02:13:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 02:13:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-11-07 02:13:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 02:13:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-11-07 02:13:47,985 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 137 [2020-11-07 02:13:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:13:47,986 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-11-07 02:13:47,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 02:13:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-11-07 02:13:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-07 02:13:47,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:13:47,987 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] [2020-11-07 02:13:47,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 02:13:47,987 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:13:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:13:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash 649392305, now seen corresponding path program 23 times [2020-11-07 02:13:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:13:47,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581736027] [2020-11-07 02:13:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:13:49,156 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 156 DAG size of output: 119 [2020-11-07 02:13:49,783 WARN L194 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:13:50,320 WARN L194 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:13:50,322 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:13:50,323 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:13:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:52,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:13:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:13:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:13:52,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581736027] [2020-11-07 02:13:52,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:13:52,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-11-07 02:13:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193265320] [2020-11-07 02:13:52,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 02:13:52,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:13:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 02:13:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 02:13:52,683 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 50 states. [2020-11-07 02:14:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:02,241 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2020-11-07 02:14:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 02:14:02,242 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2020-11-07 02:14:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:02,244 INFO L225 Difference]: With dead ends: 163 [2020-11-07 02:14:02,244 INFO L226 Difference]: Without dead ends: 151 [2020-11-07 02:14:02,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=629, Invalid=13651, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 02:14:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-07 02:14:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-11-07 02:14:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-07 02:14:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-11-07 02:14:02,275 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2020-11-07 02:14:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:02,276 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-11-07 02:14:02,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 02:14:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-11-07 02:14:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 02:14:02,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:02,277 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] [2020-11-07 02:14:02,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 02:14:02,277 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -327348050, now seen corresponding path program 24 times [2020-11-07 02:14:02,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:02,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516953862] [2020-11-07 02:14:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:03,945 WARN L194 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 158 DAG size of output: 115 [2020-11-07 02:14:04,547 WARN L194 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:14:05,071 WARN L194 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:14:05,073 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:05,074 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:07,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516953862] [2020-11-07 02:14:07,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:07,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 02:14:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40386153] [2020-11-07 02:14:07,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 02:14:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 02:14:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 02:14:07,429 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 52 states. [2020-11-07 02:14:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:17,828 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2020-11-07 02:14:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 02:14:17,829 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 147 [2020-11-07 02:14:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:17,831 INFO L225 Difference]: With dead ends: 168 [2020-11-07 02:14:17,831 INFO L226 Difference]: Without dead ends: 156 [2020-11-07 02:14:17,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=656, Invalid=14844, Unknown=0, NotChecked=0, Total=15500 [2020-11-07 02:14:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-11-07 02:14:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-11-07 02:14:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-07 02:14:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-11-07 02:14:17,861 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-11-07 02:14:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:17,861 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-11-07 02:14:17,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 02:14:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-11-07 02:14:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-07 02:14:17,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:17,862 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] [2020-11-07 02:14:17,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 02:14:17,862 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 430597841, now seen corresponding path program 25 times [2020-11-07 02:14:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:17,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167661936] [2020-11-07 02:14:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:18,700 WARN L194 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:14:19,348 WARN L194 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:14:19,898 WARN L194 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:14:19,900 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:19,901 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167661936] [2020-11-07 02:14:22,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:22,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-11-07 02:14:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788478568] [2020-11-07 02:14:22,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 02:14:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 02:14:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 02:14:22,430 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 54 states. [2020-11-07 02:14:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:33,835 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2020-11-07 02:14:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 02:14:33,836 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 152 [2020-11-07 02:14:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:33,838 INFO L225 Difference]: With dead ends: 173 [2020-11-07 02:14:33,838 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 02:14:33,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=683, Invalid=16087, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 02:14:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 02:14:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-11-07 02:14:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 02:14:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-11-07 02:14:33,869 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 152 [2020-11-07 02:14:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:33,870 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-11-07 02:14:33,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 02:14:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-11-07 02:14:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 02:14:33,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:33,871 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] [2020-11-07 02:14:33,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 02:14:33,871 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 488402574, now seen corresponding path program 26 times [2020-11-07 02:14:33,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:33,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980016568] [2020-11-07 02:14:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:35,117 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-11-07 02:14:35,812 WARN L194 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:14:36,392 WARN L194 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:14:36,394 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:36,394 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:39,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980016568] [2020-11-07 02:14:39,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:39,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 02:14:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576612776] [2020-11-07 02:14:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 02:14:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 02:14:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 02:14:39,220 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 56 states. [2020-11-07 02:14:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:50,990 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-11-07 02:14:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 02:14:50,991 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 157 [2020-11-07 02:14:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:50,992 INFO L225 Difference]: With dead ends: 178 [2020-11-07 02:14:50,993 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 02:14:50,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=710, Invalid=17380, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 02:14:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 02:14:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-11-07 02:14:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 02:14:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-11-07 02:14:51,031 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 157 [2020-11-07 02:14:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:51,032 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-11-07 02:14:51,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 02:14:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-11-07 02:14:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-07 02:14:51,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:51,033 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] [2020-11-07 02:14:51,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 02:14:51,033 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1520782095, now seen corresponding path program 27 times [2020-11-07 02:14:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:51,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242385468] [2020-11-07 02:14:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:52,095 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:14:52,779 WARN L194 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:14:53,371 WARN L194 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:14:53,372 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:14:53,374 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242385468] [2020-11-07 02:14:56,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:56,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-11-07 02:14:56,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568206144] [2020-11-07 02:14:56,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 02:14:56,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 02:14:56,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 02:14:56,692 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 58 states. [2020-11-07 02:15:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:09,640 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2020-11-07 02:15:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 02:15:09,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 162 [2020-11-07 02:15:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:09,642 INFO L225 Difference]: With dead ends: 183 [2020-11-07 02:15:09,643 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 02:15:09,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=737, Invalid=18723, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 02:15:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 02:15:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-11-07 02:15:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-07 02:15:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-11-07 02:15:09,692 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 162 [2020-11-07 02:15:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:09,693 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-11-07 02:15:09,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 02:15:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-11-07 02:15:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-07 02:15:09,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:09,695 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] [2020-11-07 02:15:09,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 02:15:09,697 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1341655954, now seen corresponding path program 28 times [2020-11-07 02:15:09,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:09,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621490587] [2020-11-07 02:15:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:11,032 WARN L194 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 176 DAG size of output: 98 [2020-11-07 02:15:11,744 WARN L194 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:15:12,351 WARN L194 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:15:12,353 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:12,354 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:15,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:15,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621490587] [2020-11-07 02:15:15,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:15,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-11-07 02:15:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073063469] [2020-11-07 02:15:15,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 02:15:15,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 02:15:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 02:15:15,944 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 60 states. [2020-11-07 02:15:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:30,595 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-11-07 02:15:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 02:15:30,596 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 167 [2020-11-07 02:15:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:30,598 INFO L225 Difference]: With dead ends: 188 [2020-11-07 02:15:30,598 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 02:15:30,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=764, Invalid=20116, Unknown=0, NotChecked=0, Total=20880 [2020-11-07 02:15:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 02:15:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-11-07 02:15:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 02:15:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-11-07 02:15:30,646 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-11-07 02:15:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:30,646 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-11-07 02:15:30,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 02:15:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-11-07 02:15:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 02:15:30,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:30,647 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] [2020-11-07 02:15:30,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 02:15:30,648 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1609049327, now seen corresponding path program 29 times [2020-11-07 02:15:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:30,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561592842] [2020-11-07 02:15:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:31,836 WARN L194 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:15:32,563 WARN L194 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:15:33,173 WARN L194 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:15:33,175 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:33,177 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:37,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561592842] [2020-11-07 02:15:37,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:37,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-11-07 02:15:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079589435] [2020-11-07 02:15:37,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 02:15:37,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 02:15:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 02:15:37,053 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 62 states. [2020-11-07 02:15:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:52,657 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-11-07 02:15:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 02:15:52,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-11-07 02:15:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:52,661 INFO L225 Difference]: With dead ends: 193 [2020-11-07 02:15:52,661 INFO L226 Difference]: Without dead ends: 181 [2020-11-07 02:15:52,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=791, Invalid=21559, Unknown=0, NotChecked=0, Total=22350 [2020-11-07 02:15:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-07 02:15:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-11-07 02:15:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-11-07 02:15:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-11-07 02:15:52,705 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2020-11-07 02:15:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:52,706 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-11-07 02:15:52,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 02:15:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-11-07 02:15:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 02:15:52,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:52,707 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] [2020-11-07 02:15:52,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 02:15:52,707 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:52,708 INFO L82 PathProgramCache]: Analyzing trace with hash -231890354, now seen corresponding path program 30 times [2020-11-07 02:15:52,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:52,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663921526] [2020-11-07 02:15:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:54,518 WARN L194 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 160 DAG size of output: 115 [2020-11-07 02:15:55,266 WARN L194 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:15:55,894 WARN L194 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:15:55,896 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:15:55,897 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:00,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:16:00,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663921526] [2020-11-07 02:16:00,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:00,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-11-07 02:16:00,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142610781] [2020-11-07 02:16:00,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 02:16:00,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 02:16:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 02:16:00,076 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 64 states. [2020-11-07 02:16:17,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:17,121 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-11-07 02:16:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 02:16:17,122 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 177 [2020-11-07 02:16:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:17,124 INFO L225 Difference]: With dead ends: 198 [2020-11-07 02:16:17,124 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 02:16:17,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=818, Invalid=23052, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 02:16:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 02:16:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-11-07 02:16:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-07 02:16:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-11-07 02:16:17,177 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2020-11-07 02:16:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:17,178 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-11-07 02:16:17,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 02:16:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-11-07 02:16:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-11-07 02:16:17,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:17,179 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] [2020-11-07 02:16:17,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 02:16:17,179 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1582048975, now seen corresponding path program 31 times [2020-11-07 02:16:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134951546] [2020-11-07 02:16:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:19,099 WARN L194 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 156 DAG size of output: 116 [2020-11-07 02:16:19,839 WARN L194 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:16:20,499 WARN L194 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:16:20,502 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:20,503 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:16:25,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134951546] [2020-11-07 02:16:25,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:25,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-11-07 02:16:25,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789513023] [2020-11-07 02:16:25,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 02:16:25,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 02:16:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 02:16:25,139 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 66 states. [2020-11-07 02:16:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:16:44,024 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-11-07 02:16:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 02:16:44,025 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 182 [2020-11-07 02:16:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:16:44,027 INFO L225 Difference]: With dead ends: 203 [2020-11-07 02:16:44,027 INFO L226 Difference]: Without dead ends: 191 [2020-11-07 02:16:44,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=845, Invalid=24595, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 02:16:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-07 02:16:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-11-07 02:16:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-07 02:16:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-11-07 02:16:44,066 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2020-11-07 02:16:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:16:44,067 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-11-07 02:16:44,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 02:16:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-11-07 02:16:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 02:16:44,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:16:44,068 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] [2020-11-07 02:16:44,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 02:16:44,069 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:16:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:16:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1593538606, now seen corresponding path program 32 times [2020-11-07 02:16:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:16:44,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778864839] [2020-11-07 02:16:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:16:45,346 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:16:46,057 WARN L194 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:16:46,734 WARN L194 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:16:46,737 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:16:46,738 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:16:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:51,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:16:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:16:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:16:51,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778864839] [2020-11-07 02:16:51,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:16:51,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-11-07 02:16:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046340829] [2020-11-07 02:16:51,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 02:16:51,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:16:51,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 02:16:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 02:16:51,986 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 68 states. [2020-11-07 02:17:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:11,364 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-11-07 02:17:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 02:17:11,365 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 187 [2020-11-07 02:17:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:11,367 INFO L225 Difference]: With dead ends: 208 [2020-11-07 02:17:11,367 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 02:17:11,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=872, Invalid=26188, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 02:17:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 02:17:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-11-07 02:17:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-07 02:17:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-11-07 02:17:11,423 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 187 [2020-11-07 02:17:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:11,423 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-11-07 02:17:11,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 02:17:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-11-07 02:17:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-11-07 02:17:11,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:11,425 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] [2020-11-07 02:17:11,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 02:17:11,425 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash 595636049, now seen corresponding path program 33 times [2020-11-07 02:17:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:11,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815883183] [2020-11-07 02:17:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:12,698 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:17:13,448 WARN L194 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:17:14,111 WARN L194 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:17:14,113 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:17:14,114 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:17:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:19,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:17:19,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815883183] [2020-11-07 02:17:19,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:19,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-11-07 02:17:19,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695372368] [2020-11-07 02:17:19,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 02:17:19,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 02:17:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 02:17:19,415 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 70 states. [2020-11-07 02:17:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:17:41,281 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-11-07 02:17:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 02:17:41,282 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 192 [2020-11-07 02:17:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:17:41,283 INFO L225 Difference]: With dead ends: 213 [2020-11-07 02:17:41,284 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 02:17:41,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=899, Invalid=27831, Unknown=0, NotChecked=0, Total=28730 [2020-11-07 02:17:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 02:17:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-11-07 02:17:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-07 02:17:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2020-11-07 02:17:41,345 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 192 [2020-11-07 02:17:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:17:41,345 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2020-11-07 02:17:41,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 02:17:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2020-11-07 02:17:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 02:17:41,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:17:41,347 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] [2020-11-07 02:17:41,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 02:17:41,348 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:17:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:17:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2141227506, now seen corresponding path program 34 times [2020-11-07 02:17:41,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:17:41,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330234066] [2020-11-07 02:17:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:17:43,566 WARN L194 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 159 DAG size of output: 117 [2020-11-07 02:17:44,423 WARN L194 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:17:45,166 WARN L194 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:17:45,168 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:17:45,169 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:17:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:17:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:17:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:17:51,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330234066] [2020-11-07 02:17:51,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:17:51,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-11-07 02:17:51,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725245317] [2020-11-07 02:17:51,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 02:17:51,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:17:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 02:17:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 02:17:51,724 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 72 states. [2020-11-07 02:18:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:18:17,068 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2020-11-07 02:18:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 02:18:17,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 197 [2020-11-07 02:18:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:18:17,071 INFO L225 Difference]: With dead ends: 218 [2020-11-07 02:18:17,071 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 02:18:17,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5254 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 02:18:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 02:18:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-11-07 02:18:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 02:18:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-11-07 02:18:17,112 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 197 [2020-11-07 02:18:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:18:17,113 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-11-07 02:18:17,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 02:18:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-11-07 02:18:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-11-07 02:18:17,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:18:17,114 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] [2020-11-07 02:18:17,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:18:17,114 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:18:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:18:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1605345935, now seen corresponding path program 35 times [2020-11-07 02:18:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:18:17,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435859239] [2020-11-07 02:18:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:18:18,577 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:18:19,426 WARN L194 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:18:20,180 WARN L194 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:18:20,183 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:18:20,184 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:18:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:27,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:18:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:18:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:18:27,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435859239] [2020-11-07 02:18:27,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:18:27,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-11-07 02:18:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271526792] [2020-11-07 02:18:27,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 02:18:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:18:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 02:18:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 02:18:27,319 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 74 states. [2020-11-07 02:18:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:18:54,660 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2020-11-07 02:18:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 02:18:54,661 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 202 [2020-11-07 02:18:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:18:54,663 INFO L225 Difference]: With dead ends: 223 [2020-11-07 02:18:54,664 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 02:18:54,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=953, Invalid=31267, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 02:18:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 02:18:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-11-07 02:18:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-11-07 02:18:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-11-07 02:18:54,726 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2020-11-07 02:18:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:18:54,727 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-11-07 02:18:54,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 02:18:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-11-07 02:18:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 02:18:54,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:18:54,728 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:18:54,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:18:54,729 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:18:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:18:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash -825779218, now seen corresponding path program 36 times [2020-11-07 02:18:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:18:54,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121287507] [2020-11-07 02:18:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:18:55,890 WARN L194 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 176 DAG size of output: 97 [2020-11-07 02:18:56,759 WARN L194 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:18:57,518 WARN L194 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:18:57,519 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:18:57,521 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:18:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:04,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:19:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121287507] [2020-11-07 02:19:04,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:04,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-11-07 02:19:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084291699] [2020-11-07 02:19:04,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 02:19:04,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 02:19:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 02:19:04,991 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 76 states. [2020-11-07 02:19:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:19:36,606 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-11-07 02:19:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 02:19:36,608 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 207 [2020-11-07 02:19:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:19:36,610 INFO L225 Difference]: With dead ends: 228 [2020-11-07 02:19:36,610 INFO L226 Difference]: Without dead ends: 216 [2020-11-07 02:19:36,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=980, Invalid=33060, Unknown=0, NotChecked=0, Total=34040 [2020-11-07 02:19:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-07 02:19:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-11-07 02:19:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-07 02:19:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2020-11-07 02:19:36,658 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 207 [2020-11-07 02:19:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:19:36,658 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2020-11-07 02:19:36,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 02:19:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2020-11-07 02:19:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-11-07 02:19:36,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:19:36,659 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:19:36,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:19:36,660 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:19:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:19:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1267407983, now seen corresponding path program 37 times [2020-11-07 02:19:36,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:19:36,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255604544] [2020-11-07 02:19:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:19:38,306 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:19:39,323 WARN L194 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:19:40,205 WARN L194 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:19:40,207 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:19:40,209 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:19:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:48,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:19:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:19:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:19:49,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255604544] [2020-11-07 02:19:49,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:19:49,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-11-07 02:19:49,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27126431] [2020-11-07 02:19:49,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 02:19:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:19:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 02:19:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 02:19:49,002 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 78 states. [2020-11-07 02:20:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:20:25,672 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2020-11-07 02:20:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 02:20:25,674 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 212 [2020-11-07 02:20:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:20:25,676 INFO L225 Difference]: With dead ends: 233 [2020-11-07 02:20:25,676 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 02:20:25,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1007, Invalid=34903, Unknown=0, NotChecked=0, Total=35910 [2020-11-07 02:20:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 02:20:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-11-07 02:20:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-11-07 02:20:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2020-11-07 02:20:25,721 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 212 [2020-11-07 02:20:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:20:25,721 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2020-11-07 02:20:25,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 02:20:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2020-11-07 02:20:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 02:20:25,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:20:25,722 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:20:25,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:20:25,722 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:20:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:20:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1860048434, now seen corresponding path program 38 times [2020-11-07 02:20:25,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:20:25,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547874622] [2020-11-07 02:20:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:20:28,170 WARN L194 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 158 DAG size of output: 109 [2020-11-07 02:20:29,123 WARN L194 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:20:30,068 WARN L194 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:20:30,070 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:20:30,071 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:20:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:39,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:20:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:20:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:20:39,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547874622] [2020-11-07 02:20:39,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:20:39,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-11-07 02:20:39,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165626049] [2020-11-07 02:20:39,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 02:20:39,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:20:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 02:20:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 02:20:39,762 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 80 states. [2020-11-07 02:21:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:21:19,455 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-11-07 02:21:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 02:21:19,457 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 217 [2020-11-07 02:21:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:21:19,459 INFO L225 Difference]: With dead ends: 238 [2020-11-07 02:21:19,459 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 02:21:19,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6556 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1034, Invalid=36796, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 02:21:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 02:21:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-11-07 02:21:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-11-07 02:21:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-11-07 02:21:19,509 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 217 [2020-11-07 02:21:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:21:19,509 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-11-07 02:21:19,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 02:21:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-11-07 02:21:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-11-07 02:21:19,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:21:19,511 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:21:19,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:21:19,511 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:21:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:21:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1036009905, now seen corresponding path program 39 times [2020-11-07 02:21:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:21:19,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311909268] [2020-11-07 02:21:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:21:21,351 WARN L194 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:21:22,466 WARN L194 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:21:23,527 WARN L194 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:21:23,531 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:21:23,532 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:21:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:21:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:21:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:21:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311909268] [2020-11-07 02:21:34,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:21:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-11-07 02:21:34,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253383209] [2020-11-07 02:21:34,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 02:21:34,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:21:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 02:21:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 02:21:34,253 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 82 states. [2020-11-07 02:22:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:22:19,654 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2020-11-07 02:22:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 02:22:19,657 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 222 [2020-11-07 02:22:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:22:19,658 INFO L225 Difference]: With dead ends: 243 [2020-11-07 02:22:19,658 INFO L226 Difference]: Without dead ends: 231 [2020-11-07 02:22:19,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6904 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1061, Invalid=38739, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 02:22:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-07 02:22:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-11-07 02:22:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-11-07 02:22:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2020-11-07 02:22:19,712 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 222 [2020-11-07 02:22:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:22:19,713 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2020-11-07 02:22:19,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 02:22:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2020-11-07 02:22:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-11-07 02:22:19,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:22:19,715 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:22:19,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:22:19,715 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:22:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:22:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1126408274, now seen corresponding path program 40 times [2020-11-07 02:22:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:22:19,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951384316] [2020-11-07 02:22:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:22:21,881 WARN L194 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 176 DAG size of output: 113 [2020-11-07 02:22:22,904 WARN L194 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:22:23,836 WARN L194 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:22:23,839 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:22:23,841 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:22:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:22:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:22:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:22:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951384316] [2020-11-07 02:22:36,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:22:36,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-11-07 02:22:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038421846] [2020-11-07 02:22:36,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 02:22:36,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:22:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 02:22:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 02:22:36,004 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 84 states. [2020-11-07 02:23:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:23:29,726 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-11-07 02:23:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 02:23:29,728 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 227 [2020-11-07 02:23:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:23:29,729 INFO L225 Difference]: With dead ends: 248 [2020-11-07 02:23:29,729 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 02:23:29,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=1088, Invalid=40732, Unknown=0, NotChecked=0, Total=41820 [2020-11-07 02:23:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 02:23:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-11-07 02:23:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 02:23:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-11-07 02:23:29,794 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 227 [2020-11-07 02:23:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:23:29,795 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-11-07 02:23:29,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 02:23:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-11-07 02:23:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-07 02:23:29,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:23:29,797 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:23:29,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:23:29,797 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:23:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:23:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2072278993, now seen corresponding path program 41 times [2020-11-07 02:23:29,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:23:29,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631234489] [2020-11-07 02:23:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:23:33,204 WARN L194 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 156 DAG size of output: 116 [2020-11-07 02:23:34,548 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-11-07 02:23:35,802 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 02:23:35,804 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:23:35,806 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:23:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:49,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:23:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:23:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:23:49,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631234489] [2020-11-07 02:23:49,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:23:49,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-11-07 02:23:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457543256] [2020-11-07 02:23:49,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 02:23:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:23:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 02:23:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 02:23:49,787 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 86 states.