/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:09:53,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:09:53,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:09:53,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:09:53,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:09:53,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:09:53,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:09:53,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:09:53,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:09:53,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:09:53,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:09:53,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:09:53,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:09:53,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:09:53,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:09:53,530 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:09:53,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:09:53,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:09:53,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:09:53,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:09:53,723 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:09:53,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_3.c [2022-03-20 19:09:53,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43de7c57/00ba2f08b82a4d4f85cf4b146bc67b8c/FLAG0c4746f40 [2022-03-20 19:09:54,077 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:09:54,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c [2022-03-20 19:09:54,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43de7c57/00ba2f08b82a4d4f85cf4b146bc67b8c/FLAG0c4746f40 [2022-03-20 19:09:54,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43de7c57/00ba2f08b82a4d4f85cf4b146bc67b8c [2022-03-20 19:09:54,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:09:54,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:09:54,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:09:54,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:09:54,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:09:54,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700ec856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54, skipping insertion in model container [2022-03-20 19:09:54,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:09:54,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:09:54,276 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-03-20 19:09:54,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:09:54,286 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:09:54,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-03-20 19:09:54,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:09:54,304 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:09:54,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54 WrapperNode [2022-03-20 19:09:54,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:09:54,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:09:54,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:09:54,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:09:54,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:09:54,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:09:54,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:09:54,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:09:54,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (1/1) ... [2022-03-20 19:09:54,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:09:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:09:54,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:09:54,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:09:54,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:09:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:09:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:09:54,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:09:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:09:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:09:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:09:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:09:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:09:54,450 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:09:54,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:09:54,564 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:09:54,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:09:54,568 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 19:09:54,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:09:54 BoogieIcfgContainer [2022-03-20 19:09:54,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:09:54,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:09:54,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:09:54,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:09:54,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:09:54" (1/3) ... [2022-03-20 19:09:54,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1226240c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:09:54, skipping insertion in model container [2022-03-20 19:09:54,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:09:54" (2/3) ... [2022-03-20 19:09:54,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1226240c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:09:54, skipping insertion in model container [2022-03-20 19:09:54,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:09:54" (3/3) ... [2022-03-20 19:09:54,574 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2022-03-20 19:09:54,577 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:09:54,577 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:09:54,601 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:09:54,605 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:09:54,605 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:09:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 19:09:54,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:54,624 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:54,624 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1607939523, now seen corresponding path program 1 times [2022-03-20 19:09:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29562261] [2022-03-20 19:09:54,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:09:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1607939523, now seen corresponding path program 2 times [2022-03-20 19:09:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019952210] [2022-03-20 19:09:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:54,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019952210] [2022-03-20 19:09:54,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019952210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:54,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:54,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:09:54,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29562261] [2022-03-20 19:09:54,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29562261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:54,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:54,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:09:54,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426354057] [2022-03-20 19:09:54,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:54,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:09:54,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:09:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:09:54,825 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:54,858 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-03-20 19:09:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:09:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 19:09:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:54,863 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:09:54,863 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 19:09:54,865 INFO L912 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 [2022-03-20 19:09:54,867 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:54,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 19:09:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 19:09:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-03-20 19:09:54,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-03-20 19:09:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:54,893 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-03-20 19:09:54,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-03-20 19:09:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 19:09:54,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:54,894 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:54,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:09:54,894 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1607968353, now seen corresponding path program 1 times [2022-03-20 19:09:54,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975517556] [2022-03-20 19:09:54,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:09:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1607968353, now seen corresponding path program 2 times [2022-03-20 19:09:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:54,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758539266] [2022-03-20 19:09:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:54,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:54,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758539266] [2022-03-20 19:09:54,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758539266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:54,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:54,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:54,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975517556] [2022-03-20 19:09:54,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975517556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:54,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:54,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730515764] [2022-03-20 19:09:54,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:54,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:09:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:09:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:09:54,946 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:54,970 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-03-20 19:09:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:09:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 19:09:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:54,971 INFO L225 Difference]: With dead ends: 24 [2022-03-20 19:09:54,971 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 19:09:54,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:09:54,972 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:54,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 19:09:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-03-20 19:09:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-20 19:09:54,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-20 19:09:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:54,977 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-20 19:09:54,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-20 19:09:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 19:09:54,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:54,978 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:54,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:09:54,978 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899718, now seen corresponding path program 1 times [2022-03-20 19:09:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727663269] [2022-03-20 19:09:55,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1694000335, now seen corresponding path program 1 times [2022-03-20 19:09:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846000936] [2022-03-20 19:09:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:55,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:55,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846000936] [2022-03-20 19:09:55,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846000936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:55,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:55,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:55,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727663269] [2022-03-20 19:09:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727663269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:55,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:55,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:09:55,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225836709] [2022-03-20 19:09:55,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:55,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:09:55,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:55,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:09:55,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:09:55,166 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:55,208 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-20 19:09:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:09:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 19:09:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:55,212 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:09:55,212 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 19:09:55,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:09:55,214 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:55,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 19:09:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2022-03-20 19:09:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 19:09:55,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-20 19:09:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:55,218 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 19:09:55,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 19:09:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 19:09:55,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:55,219 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:55,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:09:55,219 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2039168997, now seen corresponding path program 1 times [2022-03-20 19:09:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:55,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432921248] [2022-03-20 19:09:55,487 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 19:09:55,487 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 19:09:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2039168997, now seen corresponding path program 2 times [2022-03-20 19:09:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194639943] [2022-03-20 19:09:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:55,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:55,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194639943] [2022-03-20 19:09:55,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194639943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:55,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:55,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:55,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:55,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432921248] [2022-03-20 19:09:55,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432921248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:55,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:55,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:55,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546384320] [2022-03-20 19:09:55,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:55,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:09:55,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:09:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:09:55,563 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:55,590 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-03-20 19:09:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:09:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 19:09:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:55,591 INFO L225 Difference]: With dead ends: 28 [2022-03-20 19:09:55,591 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 19:09:55,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:09:55,592 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:55,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 19:09:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-20 19:09:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 19:09:55,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-20 19:09:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:55,606 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 19:09:55,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 19:09:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 19:09:55,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:55,607 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:55,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 19:09:55,607 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -434811975, now seen corresponding path program 1 times [2022-03-20 19:09:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536238953] [2022-03-20 19:09:56,151 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1694061839, now seen corresponding path program 1 times [2022-03-20 19:09:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304881264] [2022-03-20 19:09:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:56,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304881264] [2022-03-20 19:09:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304881264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:56,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:56,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:56,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536238953] [2022-03-20 19:09:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536238953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:56,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:56,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:09:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070728918] [2022-03-20 19:09:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:56,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:09:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:09:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:09:56,205 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:56,265 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-03-20 19:09:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:09:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 19:09:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:56,266 INFO L225 Difference]: With dead ends: 41 [2022-03-20 19:09:56,266 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 19:09:56,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:09:56,267 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:56,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 19:09:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-03-20 19:09:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-20 19:09:56,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-03-20 19:09:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:56,271 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-20 19:09:56,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-20 19:09:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 19:09:56,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:56,272 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:56,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 19:09:56,273 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash -540973097, now seen corresponding path program 2 times [2022-03-20 19:09:56,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:56,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9488991] [2022-03-20 19:09:56,769 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:56,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1694123343, now seen corresponding path program 1 times [2022-03-20 19:09:56,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:56,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768053831] [2022-03-20 19:09:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:56,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:56,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768053831] [2022-03-20 19:09:56,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768053831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:56,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:56,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:56,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9488991] [2022-03-20 19:09:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9488991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:56,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:56,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:09:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408264140] [2022-03-20 19:09:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:56,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:09:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:09:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:09:56,830 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:56,911 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-03-20 19:09:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:09:56,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 19:09:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:56,912 INFO L225 Difference]: With dead ends: 43 [2022-03-20 19:09:56,912 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 19:09:56,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:09:56,913 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:56,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 23 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 19:09:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2022-03-20 19:09:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-03-20 19:09:56,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-03-20 19:09:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:56,918 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-03-20 19:09:56,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-03-20 19:09:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 19:09:56,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:56,919 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:56,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 19:09:56,919 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 517403765, now seen corresponding path program 3 times [2022-03-20 19:09:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552250637] [2022-03-20 19:09:57,264 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1694184847, now seen corresponding path program 1 times [2022-03-20 19:09:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:57,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724698025] [2022-03-20 19:09:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724698025] [2022-03-20 19:09:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724698025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:57,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:57,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:57,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552250637] [2022-03-20 19:09:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552250637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:57,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:57,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:09:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72136264] [2022-03-20 19:09:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:57,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:09:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:09:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:09:57,373 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:57,459 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-03-20 19:09:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:09:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 19:09:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:57,460 INFO L225 Difference]: With dead ends: 45 [2022-03-20 19:09:57,460 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 19:09:57,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:09:57,461 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:57,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 19:09:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2022-03-20 19:09:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 19:09:57,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2022-03-20 19:09:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:57,465 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 19:09:57,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 19:09:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 19:09:57,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:57,466 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:57,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 19:09:57,466 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -289681005, now seen corresponding path program 4 times [2022-03-20 19:09:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:57,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586620095] [2022-03-20 19:09:57,939 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1694246351, now seen corresponding path program 1 times [2022-03-20 19:09:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736313610] [2022-03-20 19:09:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736313610] [2022-03-20 19:09:57,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736313610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:57,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:57,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:58,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:58,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586620095] [2022-03-20 19:09:58,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586620095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:58,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:58,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:09:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042948841] [2022-03-20 19:09:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:58,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:09:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:09:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:09:58,039 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:58,146 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-03-20 19:09:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:09:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 19:09:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:58,147 INFO L225 Difference]: With dead ends: 47 [2022-03-20 19:09:58,147 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 19:09:58,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:09:58,148 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:58,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:09:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 19:09:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-03-20 19:09:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-20 19:09:58,152 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-03-20 19:09:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:58,152 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-20 19:09:58,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-20 19:09:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 19:09:58,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:58,153 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:58,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 19:09:58,153 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1490935601, now seen corresponding path program 5 times [2022-03-20 19:09:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:58,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390270459] [2022-03-20 19:09:58,469 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1694307855, now seen corresponding path program 1 times [2022-03-20 19:09:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:58,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586317373] [2022-03-20 19:09:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:58,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586317373] [2022-03-20 19:09:58,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586317373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:58,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:58,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:58,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390270459] [2022-03-20 19:09:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390270459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:58,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:58,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:09:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438247792] [2022-03-20 19:09:58,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:58,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:09:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:09:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:09:58,582 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:58,701 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-20 19:09:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:09:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 19:09:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:58,702 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:09:58,702 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 19:09:58,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:09:58,703 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:58,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 23 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:09:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 19:09:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-03-20 19:09:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-20 19:09:58,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-03-20 19:09:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:58,708 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-20 19:09:58,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-20 19:09:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 19:09:58,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:58,709 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:58,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 19:09:58,709 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1028457137, now seen corresponding path program 6 times [2022-03-20 19:09:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:58,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803899900] [2022-03-20 19:09:58,833 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:09:59,233 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1694369359, now seen corresponding path program 1 times [2022-03-20 19:09:59,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:59,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911817086] [2022-03-20 19:09:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:59,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:59,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911817086] [2022-03-20 19:09:59,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911817086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:59,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:59,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:59,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803899900] [2022-03-20 19:09:59,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803899900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:59,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:59,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:09:59,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497138671] [2022-03-20 19:09:59,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:59,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:09:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:59,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:09:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:09:59,365 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:59,524 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-20 19:09:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:09:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 19:09:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:59,525 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:09:59,526 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 19:09:59,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:09:59,527 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:59,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 22 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:09:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 19:09:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-03-20 19:09:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-20 19:09:59,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2022-03-20 19:09:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:59,533 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-20 19:09:59,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:09:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-20 19:09:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:09:59,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:59,533 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:59,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 19:09:59,534 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:59,534 INFO L85 PathProgramCache]: Analyzing trace with hash -818587708, now seen corresponding path program 7 times [2022-03-20 19:09:59,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:59,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839891240] [2022-03-20 19:09:59,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:00,176 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1694430863, now seen corresponding path program 1 times [2022-03-20 19:10:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507381079] [2022-03-20 19:10:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:00,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:00,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507381079] [2022-03-20 19:10:00,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507381079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:00,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:00,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:00,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839891240] [2022-03-20 19:10:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839891240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:00,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:00,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 19:10:00,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881457164] [2022-03-20 19:10:00,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:00,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 19:10:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:00,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 19:10:00,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:10:00,341 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:00,495 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-03-20 19:10:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:10:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 19:10:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:00,496 INFO L225 Difference]: With dead ends: 53 [2022-03-20 19:10:00,496 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 19:10:00,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:10:00,497 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:00,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 27 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:10:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 19:10:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-03-20 19:10:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-03-20 19:10:00,503 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-03-20 19:10:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:00,504 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-03-20 19:10:00,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-03-20 19:10:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 19:10:00,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:00,504 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:00,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 19:10:00,505 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 17734946, now seen corresponding path program 8 times [2022-03-20 19:10:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [905476581] [2022-03-20 19:10:01,286 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1694492367, now seen corresponding path program 1 times [2022-03-20 19:10:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229812851] [2022-03-20 19:10:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:01,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229812851] [2022-03-20 19:10:01,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229812851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:01,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:01,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:01,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [905476581] [2022-03-20 19:10:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [905476581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:01,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:01,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:10:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658593200] [2022-03-20 19:10:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:01,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:10:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:10:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:10:01,436 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:01,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:01,676 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-03-20 19:10:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:10:01,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 19:10:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:01,677 INFO L225 Difference]: With dead ends: 55 [2022-03-20 19:10:01,677 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 19:10:01,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:10:01,678 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:01,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 57 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:10:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 19:10:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-20 19:10:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 19:10:01,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2022-03-20 19:10:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:01,685 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 19:10:01,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 19:10:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:10:01,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:01,687 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:01,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 19:10:01,687 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 564921088, now seen corresponding path program 9 times [2022-03-20 19:10:01,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:01,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296014143] [2022-03-20 19:10:01,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:02,271 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1694553871, now seen corresponding path program 1 times [2022-03-20 19:10:02,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994390520] [2022-03-20 19:10:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:02,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994390520] [2022-03-20 19:10:02,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994390520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:02,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:02,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:02,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296014143] [2022-03-20 19:10:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296014143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:02,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:10:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217621354] [2022-03-20 19:10:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:02,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:10:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:10:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:10:02,414 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:02,698 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-20 19:10:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:10:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 19:10:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:02,699 INFO L225 Difference]: With dead ends: 57 [2022-03-20 19:10:02,699 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:10:02,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:10:02,700 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:02,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:10:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:10:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-03-20 19:10:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-03-20 19:10:02,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2022-03-20 19:10:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:02,706 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-03-20 19:10:02,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-03-20 19:10:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 19:10:02,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:02,709 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:02,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 19:10:02,709 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1870173858, now seen corresponding path program 10 times [2022-03-20 19:10:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103260648] [2022-03-20 19:10:02,971 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:03,350 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1694615375, now seen corresponding path program 1 times [2022-03-20 19:10:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:03,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973907011] [2022-03-20 19:10:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:03,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973907011] [2022-03-20 19:10:03,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973907011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:03,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:03,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:03,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:03,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103260648] [2022-03-20 19:10:03,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103260648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:03,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:10:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520568160] [2022-03-20 19:10:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:03,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:10:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:10:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:10:03,512 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:03,766 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-03-20 19:10:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:10:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 19:10:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:03,767 INFO L225 Difference]: With dead ends: 59 [2022-03-20 19:10:03,767 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 19:10:03,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:10:03,768 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:03,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:10:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 19:10:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-03-20 19:10:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-03-20 19:10:03,775 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2022-03-20 19:10:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:03,775 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-03-20 19:10:03,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-03-20 19:10:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 19:10:03,776 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:03,776 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:03,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 19:10:03,776 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1239240644, now seen corresponding path program 11 times [2022-03-20 19:10:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309481281] [2022-03-20 19:10:04,040 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:04,439 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1694676879, now seen corresponding path program 1 times [2022-03-20 19:10:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861648723] [2022-03-20 19:10:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861648723] [2022-03-20 19:10:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861648723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:04,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:04,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:04,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:04,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309481281] [2022-03-20 19:10:04,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309481281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:04,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:04,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:10:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441877993] [2022-03-20 19:10:04,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:04,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:10:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:10:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:10:04,593 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:04,918 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-20 19:10:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:10:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 19:10:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:04,919 INFO L225 Difference]: With dead ends: 63 [2022-03-20 19:10:04,919 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 19:10:04,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:10:04,920 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:04,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 27 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 19:10:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2022-03-20 19:10:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-03-20 19:10:04,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2022-03-20 19:10:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:04,939 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-03-20 19:10:04,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-03-20 19:10:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 19:10:04,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:04,941 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:04,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 19:10:04,941 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -502810726, now seen corresponding path program 12 times [2022-03-20 19:10:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725604673] [2022-03-20 19:10:05,397 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1694738383, now seen corresponding path program 1 times [2022-03-20 19:10:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131371120] [2022-03-20 19:10:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:05,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131371120] [2022-03-20 19:10:05,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131371120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:05,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:05,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:05,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725604673] [2022-03-20 19:10:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725604673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:05,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:05,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 19:10:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290167458] [2022-03-20 19:10:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:05,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 19:10:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 19:10:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:10:05,652 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:05,982 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-03-20 19:10:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:10:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 19:10:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:05,983 INFO L225 Difference]: With dead ends: 64 [2022-03-20 19:10:05,983 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 19:10:05,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:10:05,984 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:05,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 22 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 19:10:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-03-20 19:10:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-03-20 19:10:06,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2022-03-20 19:10:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:06,010 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-03-20 19:10:06,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-03-20 19:10:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 19:10:06,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:06,010 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:06,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 19:10:06,011 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 163599449, now seen corresponding path program 13 times [2022-03-20 19:10:06,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:06,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224062035] [2022-03-20 19:10:06,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:06,646 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1694799887, now seen corresponding path program 1 times [2022-03-20 19:10:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:06,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574150863] [2022-03-20 19:10:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:06,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:06,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574150863] [2022-03-20 19:10:06,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574150863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:06,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:06,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:06,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224062035] [2022-03-20 19:10:06,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224062035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:06,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:10:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649032855] [2022-03-20 19:10:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:06,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:10:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:10:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:10:06,873 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:07,266 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-03-20 19:10:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:10:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 19:10:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:07,267 INFO L225 Difference]: With dead ends: 68 [2022-03-20 19:10:07,267 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 19:10:07,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:10:07,268 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:07,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 67 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 19:10:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-03-20 19:10:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-03-20 19:10:07,277 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2022-03-20 19:10:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:07,278 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-03-20 19:10:07,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-03-20 19:10:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 19:10:07,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:07,278 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:07,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 19:10:07,279 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash -993212297, now seen corresponding path program 14 times [2022-03-20 19:10:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:07,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236914436] [2022-03-20 19:10:08,069 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1694861391, now seen corresponding path program 1 times [2022-03-20 19:10:08,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196598935] [2022-03-20 19:10:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:08,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196598935] [2022-03-20 19:10:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196598935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:08,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:08,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:08,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236914436] [2022-03-20 19:10:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236914436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:08,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:08,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:10:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964903893] [2022-03-20 19:10:08,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:08,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:10:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:10:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:10:08,355 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:08,725 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-03-20 19:10:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 19:10:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-20 19:10:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:08,727 INFO L225 Difference]: With dead ends: 70 [2022-03-20 19:10:08,728 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 19:10:08,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:10:08,729 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:08,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 82 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 19:10:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-03-20 19:10:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-20 19:10:08,739 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-03-20 19:10:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:08,739 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-20 19:10:08,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-20 19:10:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 19:10:08,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:08,740 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:08,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 19:10:08,740 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -292770539, now seen corresponding path program 15 times [2022-03-20 19:10:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:08,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1754512509] [2022-03-20 19:10:09,312 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1694922895, now seen corresponding path program 1 times [2022-03-20 19:10:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893753034] [2022-03-20 19:10:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:09,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:09,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893753034] [2022-03-20 19:10:09,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893753034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:09,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:09,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:09,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1754512509] [2022-03-20 19:10:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1754512509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:09,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:09,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 19:10:09,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576357352] [2022-03-20 19:10:09,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:09,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 19:10:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 19:10:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:10:09,563 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:09,879 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-03-20 19:10:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 19:10:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 19:10:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:09,879 INFO L225 Difference]: With dead ends: 72 [2022-03-20 19:10:09,879 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 19:10:09,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:10:09,881 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:09,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 19:10:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-03-20 19:10:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-03-20 19:10:09,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-03-20 19:10:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:09,916 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-03-20 19:10:09,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-03-20 19:10:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 19:10:09,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:09,917 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:09,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 19:10:09,917 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1478106573, now seen corresponding path program 16 times [2022-03-20 19:10:09,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581937973] [2022-03-20 19:10:10,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:10,350 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1694984399, now seen corresponding path program 1 times [2022-03-20 19:10:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957963003] [2022-03-20 19:10:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:10,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957963003] [2022-03-20 19:10:10,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957963003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:10,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:10,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:10,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581937973] [2022-03-20 19:10:10,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581937973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:10,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:10,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:10:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068209515] [2022-03-20 19:10:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:10,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:10:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:10:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:10:10,583 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:10,917 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-03-20 19:10:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:10:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 19:10:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:10,918 INFO L225 Difference]: With dead ends: 74 [2022-03-20 19:10:10,918 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 19:10:10,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:10:10,921 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:10,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 77 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:10:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 19:10:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-03-20 19:10:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-03-20 19:10:10,957 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2022-03-20 19:10:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:10,957 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-03-20 19:10:10,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-03-20 19:10:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 19:10:10,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:10,960 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:10,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 19:10:10,960 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1875265489, now seen corresponding path program 17 times [2022-03-20 19:10:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780164870] [2022-03-20 19:10:11,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:11,282 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1695045903, now seen corresponding path program 1 times [2022-03-20 19:10:11,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:11,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531575148] [2022-03-20 19:10:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:11,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531575148] [2022-03-20 19:10:11,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531575148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:11,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:11,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:11,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780164870] [2022-03-20 19:10:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780164870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:11,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 19:10:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517955424] [2022-03-20 19:10:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:11,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 19:10:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 19:10:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:10:11,514 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:11,894 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-03-20 19:10:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 19:10:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-20 19:10:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:11,895 INFO L225 Difference]: With dead ends: 78 [2022-03-20 19:10:11,895 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 19:10:11,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:10:11,898 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:11,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 107 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 19:10:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2022-03-20 19:10:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-03-20 19:10:11,911 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2022-03-20 19:10:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:11,911 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-03-20 19:10:11,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-03-20 19:10:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 19:10:11,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:11,912 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:11,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 19:10:11,912 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1054622225, now seen corresponding path program 18 times [2022-03-20 19:10:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:11,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856679598] [2022-03-20 19:10:12,424 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1695107407, now seen corresponding path program 1 times [2022-03-20 19:10:12,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:12,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541015180] [2022-03-20 19:10:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541015180] [2022-03-20 19:10:12,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541015180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:12,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:12,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:12,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856679598] [2022-03-20 19:10:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856679598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:12,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:12,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 19:10:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870004198] [2022-03-20 19:10:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:12,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 19:10:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 19:10:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:10:12,852 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:13,276 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-20 19:10:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 19:10:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 19:10:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:13,277 INFO L225 Difference]: With dead ends: 79 [2022-03-20 19:10:13,277 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 19:10:13,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:10:13,278 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:13,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 97 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 19:10:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-03-20 19:10:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-20 19:10:13,291 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2022-03-20 19:10:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:13,291 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-20 19:10:13,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-20 19:10:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 19:10:13,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:13,291 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:13,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 19:10:13,291 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash 172227364, now seen corresponding path program 19 times [2022-03-20 19:10:13,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:13,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322547223] [2022-03-20 19:10:13,519 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:13,863 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1695168911, now seen corresponding path program 1 times [2022-03-20 19:10:13,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:13,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565236411] [2022-03-20 19:10:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:13,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:13,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565236411] [2022-03-20 19:10:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565236411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:13,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:13,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:14,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322547223] [2022-03-20 19:10:14,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322547223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:14,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:14,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 19:10:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361133500] [2022-03-20 19:10:14,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:14,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 19:10:14,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 19:10:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:10:14,140 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:14,767 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-03-20 19:10:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 19:10:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 19:10:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:14,768 INFO L225 Difference]: With dead ends: 83 [2022-03-20 19:10:14,768 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 19:10:14,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:10:14,769 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:14,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 117 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 19:10:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-03-20 19:10:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-20 19:10:14,786 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2022-03-20 19:10:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:14,786 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-20 19:10:14,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-20 19:10:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 19:10:14,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:14,787 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:14,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 19:10:14,787 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1291720574, now seen corresponding path program 20 times [2022-03-20 19:10:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299401918] [2022-03-20 19:10:15,567 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1695230415, now seen corresponding path program 1 times [2022-03-20 19:10:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:15,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553131829] [2022-03-20 19:10:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:15,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553131829] [2022-03-20 19:10:15,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553131829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:15,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:15,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:16,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299401918] [2022-03-20 19:10:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299401918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:16,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 19:10:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510545946] [2022-03-20 19:10:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:16,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 19:10:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 19:10:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:10:16,049 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:16,519 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-03-20 19:10:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 19:10:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 19:10:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:16,520 INFO L225 Difference]: With dead ends: 85 [2022-03-20 19:10:16,520 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 19:10:16,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:10:16,521 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:16,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 92 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:10:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 19:10:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-03-20 19:10:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-03-20 19:10:16,535 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2022-03-20 19:10:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:16,535 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-03-20 19:10:16,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-03-20 19:10:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:10:16,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:16,545 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:16,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 19:10:16,546 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 603584096, now seen corresponding path program 21 times [2022-03-20 19:10:16,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195639049] [2022-03-20 19:10:16,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:17,154 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1695291919, now seen corresponding path program 1 times [2022-03-20 19:10:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:17,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724610809] [2022-03-20 19:10:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:17,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:17,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:17,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:17,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724610809] [2022-03-20 19:10:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724610809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:17,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:17,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:17,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195639049] [2022-03-20 19:10:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195639049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 19:10:17,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039648067] [2022-03-20 19:10:17,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:17,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 19:10:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 19:10:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:10:17,565 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:18,329 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-03-20 19:10:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 19:10:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 19:10:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:18,329 INFO L225 Difference]: With dead ends: 87 [2022-03-20 19:10:18,329 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 19:10:18,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=3149, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:10:18,331 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:18,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 42 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:10:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 19:10:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2022-03-20 19:10:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-03-20 19:10:18,346 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2022-03-20 19:10:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:18,346 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-03-20 19:10:18,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-03-20 19:10:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 19:10:18,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:18,346 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:18,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 19:10:18,346 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 925238462, now seen corresponding path program 22 times [2022-03-20 19:10:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:18,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678955712] [2022-03-20 19:10:18,793 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1695353423, now seen corresponding path program 1 times [2022-03-20 19:10:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:18,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966328488] [2022-03-20 19:10:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:18,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:18,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966328488] [2022-03-20 19:10:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966328488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:18,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:19,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678955712] [2022-03-20 19:10:19,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678955712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:19,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:19,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 19:10:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609151769] [2022-03-20 19:10:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:19,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 19:10:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 19:10:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:10:19,128 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:19,672 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2022-03-20 19:10:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 19:10:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 19:10:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:19,673 INFO L225 Difference]: With dead ends: 89 [2022-03-20 19:10:19,673 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 19:10:19,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=3378, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 19:10:19,676 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:19,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 112 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 19:10:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-03-20 19:10:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-03-20 19:10:19,698 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2022-03-20 19:10:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:19,698 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-03-20 19:10:19,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-03-20 19:10:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 19:10:19,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:19,699 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:19,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 19:10:19,699 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 797438876, now seen corresponding path program 23 times [2022-03-20 19:10:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [824648312] [2022-03-20 19:10:19,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:20,038 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1695414927, now seen corresponding path program 1 times [2022-03-20 19:10:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:20,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362719899] [2022-03-20 19:10:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:20,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:20,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362719899] [2022-03-20 19:10:20,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362719899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:20,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:20,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:20,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [824648312] [2022-03-20 19:10:20,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [824648312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:20,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:20,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 19:10:20,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67469408] [2022-03-20 19:10:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:20,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 19:10:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 19:10:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:10:20,420 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:21,113 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-03-20 19:10:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 19:10:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 19:10:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:21,115 INFO L225 Difference]: With dead ends: 93 [2022-03-20 19:10:21,115 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 19:10:21,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=291, Invalid=3615, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:10:21,116 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:21,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 27 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:10:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 19:10:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-03-20 19:10:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-20 19:10:21,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 70 [2022-03-20 19:10:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:21,154 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-20 19:10:21,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-20 19:10:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 19:10:21,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:21,155 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:21,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 19:10:21,155 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1758878982, now seen corresponding path program 24 times [2022-03-20 19:10:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578240071] [2022-03-20 19:10:21,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:21,751 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1695476431, now seen corresponding path program 1 times [2022-03-20 19:10:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270573642] [2022-03-20 19:10:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:21,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:21,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270573642] [2022-03-20 19:10:21,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270573642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:21,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:21,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:22,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578240071] [2022-03-20 19:10:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578240071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:22,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 19:10:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949518281] [2022-03-20 19:10:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:22,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 19:10:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 19:10:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:10:22,213 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:22,856 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-03-20 19:10:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 19:10:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 19:10:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:22,857 INFO L225 Difference]: With dead ends: 94 [2022-03-20 19:10:22,857 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 19:10:22,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=3860, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:10:22,858 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:22,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 117 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 19:10:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-03-20 19:10:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-03-20 19:10:22,876 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2022-03-20 19:10:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:22,877 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-03-20 19:10:22,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-03-20 19:10:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 19:10:22,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:22,877 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:22,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 19:10:22,877 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:22,877 INFO L85 PathProgramCache]: Analyzing trace with hash 132809977, now seen corresponding path program 25 times [2022-03-20 19:10:22,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:22,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100294114] [2022-03-20 19:10:23,044 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:23,428 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1695537935, now seen corresponding path program 1 times [2022-03-20 19:10:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:23,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846568656] [2022-03-20 19:10:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:23,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:23,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846568656] [2022-03-20 19:10:23,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846568656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:23,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:23,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:24,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100294114] [2022-03-20 19:10:24,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100294114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:24,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:24,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 19:10:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833369310] [2022-03-20 19:10:24,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:24,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 19:10:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 19:10:24,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 19:10:24,120 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:24,764 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-03-20 19:10:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 19:10:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 19:10:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:24,765 INFO L225 Difference]: With dead ends: 98 [2022-03-20 19:10:24,765 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 19:10:24,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 20 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=4374, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:10:24,766 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:24,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 17 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:10:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 19:10:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-03-20 19:10:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-03-20 19:10:24,786 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2022-03-20 19:10:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:24,786 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-03-20 19:10:24,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-03-20 19:10:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 19:10:24,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:24,787 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:24,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 19:10:24,787 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -517123817, now seen corresponding path program 26 times [2022-03-20 19:10:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:24,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873537196] [2022-03-20 19:10:24,956 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:25,313 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1695599439, now seen corresponding path program 1 times [2022-03-20 19:10:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34021158] [2022-03-20 19:10:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:25,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:25,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34021158] [2022-03-20 19:10:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34021158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:25,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:25,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:25,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:25,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873537196] [2022-03-20 19:10:25,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873537196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:25,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:25,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 19:10:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608651441] [2022-03-20 19:10:25,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:25,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 19:10:25,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 19:10:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:10:25,922 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:26,660 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-03-20 19:10:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 19:10:26,660 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 19:10:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:26,661 INFO L225 Difference]: With dead ends: 100 [2022-03-20 19:10:26,661 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 19:10:26,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 16 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=4643, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:10:26,663 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:26,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:10:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 19:10:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-03-20 19:10:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-03-20 19:10:26,698 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-03-20 19:10:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:26,698 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-03-20 19:10:26,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-03-20 19:10:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:10:26,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:26,699 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:26,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 19:10:26,699 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1961725365, now seen corresponding path program 27 times [2022-03-20 19:10:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324370811] [2022-03-20 19:10:27,409 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1695660943, now seen corresponding path program 1 times [2022-03-20 19:10:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102650046] [2022-03-20 19:10:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:27,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102650046] [2022-03-20 19:10:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102650046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:27,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:27,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:28,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324370811] [2022-03-20 19:10:28,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324370811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:28,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:28,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 19:10:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918184475] [2022-03-20 19:10:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:28,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 19:10:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 19:10:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:10:28,094 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:28,978 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-20 19:10:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 19:10:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 19:10:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:28,979 INFO L225 Difference]: With dead ends: 102 [2022-03-20 19:10:28,979 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 19:10:28,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 16 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=336, Invalid=4920, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:10:28,980 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:28,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 32 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:10:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 19:10:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2022-03-20 19:10:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-03-20 19:10:29,003 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-03-20 19:10:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:29,003 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-03-20 19:10:29,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-03-20 19:10:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 19:10:29,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:29,003 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:29,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 19:10:29,004 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 428939987, now seen corresponding path program 28 times [2022-03-20 19:10:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742605775] [2022-03-20 19:10:29,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:29,582 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1695722447, now seen corresponding path program 1 times [2022-03-20 19:10:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:29,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566854333] [2022-03-20 19:10:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:29,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566854333] [2022-03-20 19:10:29,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566854333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:29,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:29,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:30,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:30,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742605775] [2022-03-20 19:10:30,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742605775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:30,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:30,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 19:10:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734591009] [2022-03-20 19:10:30,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:30,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 19:10:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 19:10:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:10:30,324 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:31,226 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2022-03-20 19:10:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 19:10:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 19:10:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:31,227 INFO L225 Difference]: With dead ends: 104 [2022-03-20 19:10:31,227 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 19:10:31,229 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 17 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=345, Invalid=5205, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:10:31,229 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:31,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 102 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:10:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 19:10:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-03-20 19:10:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-03-20 19:10:31,253 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2022-03-20 19:10:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:31,253 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-03-20 19:10:31,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-03-20 19:10:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 19:10:31,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:31,254 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:31,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 19:10:31,254 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:31,254 INFO L85 PathProgramCache]: Analyzing trace with hash 595974257, now seen corresponding path program 29 times [2022-03-20 19:10:31,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:31,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618716511] [2022-03-20 19:10:31,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:31,687 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1695783951, now seen corresponding path program 1 times [2022-03-20 19:10:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:31,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078432523] [2022-03-20 19:10:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:31,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:31,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078432523] [2022-03-20 19:10:31,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078432523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:31,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:31,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:32,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618716511] [2022-03-20 19:10:32,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618716511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:32,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:32,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 19:10:32,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309056857] [2022-03-20 19:10:32,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:32,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 19:10:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 19:10:32,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:10:32,191 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:33,332 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-03-20 19:10:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 19:10:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 19:10:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:33,333 INFO L225 Difference]: With dead ends: 108 [2022-03-20 19:10:33,333 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 19:10:33,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 29 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=5498, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:10:33,335 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 108 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:33,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:10:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 19:10:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2022-03-20 19:10:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-03-20 19:10:33,360 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2022-03-20 19:10:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:33,361 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-03-20 19:10:33,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-03-20 19:10:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 19:10:33,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:33,361 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:33,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 19:10:33,361 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2092849521, now seen corresponding path program 30 times [2022-03-20 19:10:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:33,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017262927] [2022-03-20 19:10:34,064 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1695845455, now seen corresponding path program 1 times [2022-03-20 19:10:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:34,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552635297] [2022-03-20 19:10:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:34,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:34,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552635297] [2022-03-20 19:10:34,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552635297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:34,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:34,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:34,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017262927] [2022-03-20 19:10:34,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017262927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:34,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:34,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 19:10:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377998102] [2022-03-20 19:10:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:34,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 19:10:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 19:10:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:10:34,594 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:35,994 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-03-20 19:10:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 19:10:35,995 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 19:10:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:35,995 INFO L225 Difference]: With dead ends: 109 [2022-03-20 19:10:35,995 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 19:10:35,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 30 SyntacticMatches, 19 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=5799, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 19:10:35,996 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:35,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 162 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:10:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 19:10:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2022-03-20 19:10:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-20 19:10:36,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2022-03-20 19:10:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:36,022 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-20 19:10:36,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-20 19:10:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 19:10:36,023 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:36,023 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:36,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 19:10:36,023 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 127825540, now seen corresponding path program 31 times [2022-03-20 19:10:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:36,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407830947] [2022-03-20 19:10:36,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:36,468 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1695906959, now seen corresponding path program 1 times [2022-03-20 19:10:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:36,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183855217] [2022-03-20 19:10:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:36,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:36,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183855217] [2022-03-20 19:10:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183855217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:36,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:36,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:37,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:37,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407830947] [2022-03-20 19:10:37,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407830947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:37,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:37,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 19:10:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851834422] [2022-03-20 19:10:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:37,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 19:10:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 19:10:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:10:37,137 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:38,132 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-03-20 19:10:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 19:10:38,133 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 19:10:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:38,133 INFO L225 Difference]: With dead ends: 113 [2022-03-20 19:10:38,133 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 19:10:38,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=6425, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:10:38,135 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:38,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 152 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:10:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 19:10:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2022-03-20 19:10:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-20 19:10:38,174 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2022-03-20 19:10:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:38,174 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-20 19:10:38,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-20 19:10:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 19:10:38,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:38,174 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:38,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 19:10:38,175 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1012200478, now seen corresponding path program 32 times [2022-03-20 19:10:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:38,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721366696] [2022-03-20 19:10:38,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:38,697 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1695968463, now seen corresponding path program 1 times [2022-03-20 19:10:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:38,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610991869] [2022-03-20 19:10:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:38,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:38,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610991869] [2022-03-20 19:10:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610991869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:38,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:39,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721366696] [2022-03-20 19:10:39,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721366696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:39,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:39,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 19:10:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479464710] [2022-03-20 19:10:39,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:39,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 19:10:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 19:10:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1760, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 19:10:39,683 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:41,195 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-03-20 19:10:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 19:10:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 19:10:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:41,196 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:10:41,196 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 19:10:41,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=6750, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:10:41,197 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3374 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:41,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 72 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3374 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:10:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 19:10:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-03-20 19:10:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-20 19:10:41,237 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2022-03-20 19:10:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:41,238 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-20 19:10:41,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 43 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-20 19:10:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 19:10:41,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:41,239 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:41,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 19:10:41,239 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1360543296, now seen corresponding path program 33 times [2022-03-20 19:10:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:41,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329528159] [2022-03-20 19:10:41,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:41,737 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1696029967, now seen corresponding path program 1 times [2022-03-20 19:10:41,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:41,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144174008] [2022-03-20 19:10:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:41,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144174008] [2022-03-20 19:10:41,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144174008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:41,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:41,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:42,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:42,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329528159] [2022-03-20 19:10:42,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329528159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:42,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:42,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 19:10:42,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177885005] [2022-03-20 19:10:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:42,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 19:10:42,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 19:10:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:10:42,350 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:43,452 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2022-03-20 19:10:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 19:10:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 19:10:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:43,453 INFO L225 Difference]: With dead ends: 117 [2022-03-20 19:10:43,453 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 19:10:43,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 31 SyntacticMatches, 23 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=7083, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:10:43,454 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:43,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 152 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:10:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 19:10:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2022-03-20 19:10:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-03-20 19:10:43,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2022-03-20 19:10:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:43,484 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-03-20 19:10:43,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-03-20 19:10:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 19:10:43,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:43,484 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:43,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 19:10:43,485 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1110542306, now seen corresponding path program 34 times [2022-03-20 19:10:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:43,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494691727] [2022-03-20 19:10:43,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:44,022 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1696091471, now seen corresponding path program 1 times [2022-03-20 19:10:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169364384] [2022-03-20 19:10:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:44,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169364384] [2022-03-20 19:10:44,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169364384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:44,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:44,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:44,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494691727] [2022-03-20 19:10:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494691727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:44,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 19:10:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493908647] [2022-03-20 19:10:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:44,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 19:10:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 19:10:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:10:44,760 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:45,827 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2022-03-20 19:10:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 19:10:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 19:10:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:45,828 INFO L225 Difference]: With dead ends: 119 [2022-03-20 19:10:45,828 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 19:10:45,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 33 SyntacticMatches, 22 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=7424, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:10:45,829 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:45,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 112 Invalid, 3690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:10:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 19:10:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2022-03-20 19:10:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-03-20 19:10:45,860 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2022-03-20 19:10:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:45,860 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-03-20 19:10:45,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 45 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-03-20 19:10:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 19:10:45,873 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:45,873 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:45,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 19:10:45,873 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1377759492, now seen corresponding path program 35 times [2022-03-20 19:10:45,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:45,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951458014] [2022-03-20 19:10:46,360 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1696152975, now seen corresponding path program 1 times [2022-03-20 19:10:46,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:46,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735069212] [2022-03-20 19:10:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735069212] [2022-03-20 19:10:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735069212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:46,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:46,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:47,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:47,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951458014] [2022-03-20 19:10:47,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951458014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:47,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:47,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 19:10:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203012576] [2022-03-20 19:10:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:47,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 19:10:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 19:10:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2021, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:10:47,061 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:48,348 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2022-03-20 19:10:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 19:10:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-20 19:10:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:48,349 INFO L225 Difference]: With dead ends: 123 [2022-03-20 19:10:48,349 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:10:48,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 34 SyntacticMatches, 22 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=417, Invalid=7773, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:10:48,350 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:48,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 87 Invalid, 3607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 19:10:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:10:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2022-03-20 19:10:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-03-20 19:10:48,385 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2022-03-20 19:10:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:48,385 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-03-20 19:10:48,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 46 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-03-20 19:10:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 19:10:48,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:48,386 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:48,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 19:10:48,386 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -475437478, now seen corresponding path program 36 times [2022-03-20 19:10:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:48,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026556299] [2022-03-20 19:10:48,619 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-03-20 19:10:48,990 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:48,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1696214479, now seen corresponding path program 1 times [2022-03-20 19:10:48,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300691362] [2022-03-20 19:10:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:49,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300691362] [2022-03-20 19:10:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300691362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:49,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:10:50,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:50,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026556299] [2022-03-20 19:10:50,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026556299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:50,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:50,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 19:10:50,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011688115] [2022-03-20 19:10:50,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:50,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 19:10:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 19:10:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 19:10:50,176 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:51,877 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-03-20 19:10:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 19:10:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 19:10:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:51,878 INFO L225 Difference]: With dead ends: 120 [2022-03-20 19:10:51,878 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 19:10:51,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 20 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=462, Invalid=8280, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 19:10:51,879 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4115 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 4115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:51,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 181 Invalid, 4219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 4115 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 19:10:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 19:10:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 19:10:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-03-20 19:10:51,916 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 102 [2022-03-20 19:10:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:51,916 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-03-20 19:10:51,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:10:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-03-20 19:10:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:10:51,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:51,917 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:51,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 19:10:51,917 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:51,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1077287327, now seen corresponding path program 37 times [2022-03-20 19:10:51,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:51,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85679858] [2022-03-20 19:11:03,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 19:11:03,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 19:11:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1077287327, now seen corresponding path program 38 times [2022-03-20 19:11:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236815850] [2022-03-20 19:11:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:03,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2022-03-20 19:11:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236815850] [2022-03-20 19:11:03,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236815850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:03,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:03,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:03,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85679858] [2022-03-20 19:11:03,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85679858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:03,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:03,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654508519] [2022-03-20 19:11:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:03,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:11:03,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:11:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:11:03,924 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:11:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:03,985 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2022-03-20 19:11:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:11:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-20 19:11:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:03,986 INFO L225 Difference]: With dead ends: 125 [2022-03-20 19:11:03,986 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 19:11:03,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:11:03,987 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:03,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:11:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 19:11:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-03-20 19:11:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:11:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-03-20 19:11:04,023 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2022-03-20 19:11:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:04,023 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-03-20 19:11:04,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:11:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-03-20 19:11:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 19:11:04,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:04,024 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:04,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 19:11:04,024 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:04,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1681429132, now seen corresponding path program 39 times [2022-03-20 19:11:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:04,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117911866] [2022-03-20 19:11:05,725 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.pushout(QvasrAbstractionJoin.java:181) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.join(QvasrAbstractionJoin.java:116) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:130) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-20 19:11:05,728 INFO L158 Benchmark]: Toolchain (without parser) took 71632.04ms. Allocated memory was 199.2MB in the beginning and 307.2MB in the end (delta: 108.0MB). Free memory was 150.6MB in the beginning and 113.1MB in the end (delta: 37.5MB). Peak memory consumption was 145.2MB. Max. memory is 8.0GB. [2022-03-20 19:11:05,728 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 199.2MB. Free memory was 166.7MB in the beginning and 166.5MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:11:05,728 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.44ms. Allocated memory is still 199.2MB. Free memory was 150.5MB in the beginning and 175.7MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 19:11:05,728 INFO L158 Benchmark]: Boogie Preprocessor took 23.82ms. Allocated memory is still 199.2MB. Free memory was 175.7MB in the beginning and 174.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 19:11:05,728 INFO L158 Benchmark]: RCFGBuilder took 240.04ms. Allocated memory is still 199.2MB. Free memory was 174.2MB in the beginning and 164.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 19:11:05,728 INFO L158 Benchmark]: TraceAbstraction took 71157.57ms. Allocated memory was 199.2MB in the beginning and 307.2MB in the end (delta: 108.0MB). Free memory was 164.1MB in the beginning and 113.1MB in the end (delta: 51.1MB). Peak memory consumption was 159.4MB. Max. memory is 8.0GB. [2022-03-20 19:11:05,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 199.2MB. Free memory was 166.7MB in the beginning and 166.5MB in the end (delta: 136.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.44ms. Allocated memory is still 199.2MB. Free memory was 150.5MB in the beginning and 175.7MB in the end (delta: -25.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.82ms. Allocated memory is still 199.2MB. Free memory was 175.7MB in the beginning and 174.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.04ms. Allocated memory is still 199.2MB. Free memory was 174.2MB in the beginning and 164.8MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 71157.57ms. Allocated memory was 199.2MB in the beginning and 307.2MB in the end (delta: 108.0MB). Free memory was 164.1MB in the beginning and 113.1MB in the end (delta: 51.1MB). Peak memory consumption was 159.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 19:11:05,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...